about the chemical element pp move indef pp semi small yes Infobox uraniumUranium IPAc en icon j ... of the periodic table with atomic number 92. It is assigned the chemical symbol U . A uranium atom has 92 proton s and 92 electron s, of which 6 are valence electron s. The uranium nucleus binds between 141 and 146 neutron s, establishing six isotopes, the most common of which are uranium 238 146 neutrons and uranium 235 143 neutrons . All isotopes are unstable and uranium is weakly radioactive decay radioactive . Uranium has the second highest atomic weight of the naturally occurring elements ... notation Parts per expressions parts per million in soil, rock and water, and is commercially uranium mining extracted from uranium bearing mineral s such as uraninite . Natural uranium In nature , uranium is found as uranium 238 99.2742 , uranium 235 0.7204 , and a very small amount of uranium 234 0.0054 . Uranium decays slowly by emitting an alpha particle . The half life of uranium 238 is about 4.47 1000000000 number billion years and that of uranium 235 is 704 million years, ref cite web ... in dating the age of the Earth . Many contemporary uses of uranium exploit its unique atomic nucleus nuclear properties. Uranium 235 has the distinction of being the only naturally occurring fissile isotope . Uranium 238 is fissionable by fast neutrons, and is fertile material fertile , meaning it can be transmuted to fissile plutonium 239 in a nuclear reactor . Another fissile isotope, uranium 233 , can be produced from natural thorium and is also important in nuclear technology. While uranium 238 has a small probability for spontaneous fission or even induced fission with fast neutrons, uranium 235 and to a lesser degree uranium 233 have a much higher fission cross section for slow neutrons ... uranium U 238 is used in kinetic energy penetrator s and vehicle armour armor plating . ref name BuildingBlocks479 Harvnb Emsley 2001 p 479 . ref Uranium is used as a colorant in uranium glass ... more details
saved book title Uranium subtitle An overview cover image HEUraniumC.jpg cover color Uranium An overview Overview Uranium Isotopes Isotopes of uraniumUranium 234 Uranium 235 Uranium 238 Miscellany Enriched uranium Depleted uraniumUranium mining Uranium in the environment Uranium market Uranium lead dating Yellowcake List of countries by uranium reserves Category Wikipedia books on chemical elements Category Uranium ... more details
Uranium chloride may refer to Uranium tetrachloride uranium IV chloride , UCl sub 4 sub Uranium trichloride uranium III chloride , UCl sub 3 sub Uranium pentachloride uranium V chloride , UCl sub 5 sub Uranium hexachloride uranium VI chloride , UCl sub 6 sub disambig ... more details
Uranium may refer to Uranium , the chemical element Uranium 232 Uranium 233 Uranium 234 Uranium 235 Uranium 238 Uranium 239 Uranium 240 Uranium City, Saskatchewan , a Canadian settlement Uranium TV series Uranium TV series , a music video television series List of uranium mines disambig ca Urani desambiguaci de Uran Begriffskl rung es Uranio desambiguaci n it Uranio disambigua ... more details
Uraniumuranium dating is a radiometric dating technique which compares two isotope s of uranium U in a sample sup 234 sup U and sup 238 sup U. sup 234 sup U sup 238 sup U dating is one of several radiometric dating techniques exploiting the uranium radioactive decay series, in which sup 238 sup U undergoes 14 alpha decay alpha and beta decay events while decaying to the stable isotope sup 206 sup lead Pb . Other dating techniques using this decay series include uranium thorium dating uranium thorium using sup 230 sup Th sup 238 sup U and uranium lead dating . sup 238 sup U, with a half life of about 4.5 billion years, decays to sup 234 sup U through emission of an alpha particle to an isotope of thorium sup 234 sup Th , which is comparatively unstable with a half life of just 24 days. sup 234 sup Th then decays through beta particle emission to an isotope of protactinium , sup 234 sup Pa ... sup Th, has a half life of about 75,000 years and is used for the related uranium thorium dating sup ... the initial ratio is known, uranium thorium dating sup 230 sup Th sup 238 sup U remains a superior .... 450,000 year upper limit of the uranium thorium dating sup 230 sup Th sup 238 sup U technique. Unlike other radiometric dating techniques, those using the uranium decay series except for those using ... techniques between the ranges of uranium thorium dating sup 230 sup Th sup 238 sup U accurate up to ca. 450,000 years and Uranium lead dating U Pb dating accurate up to the age of the solar system ... 8, 2005. Shakhashiri, Bassam. http scifun.chem.wisc.edu chemweek uranium uclock.htm Chemical of the Week Uranium . University of Wisconsin Madison Chemistry Department. Retrieved July 8, 2005. http www.britannica.com eb article?tocId 9074426&query Uranium 234 Uranium 238 20Dating&ct Uranium 234 uranium 238 dating . Encyclop dia Britannica . Retrieved July 8, 2005. Category Radiometric dating Category Uranium ... more details
Uranium fluoride can refer to Uranium trifluoride , UF sub 3 sub Uranium tetrafluoride , UF sub 4 sub Uranium pentafluoride , UF sub 5 sub Uranium hexafluoride , UF sub 6 sub Tetrauranium heptadecafluoride , U sub 4 sub F sub 17 sub Tetrauranium octadecafluoride , U sub 4 sub F sub 18 sub disambig pl Fluorek uranu ru ... more details
chembox Watchedfields changed verifiedrevid 305074655 Name Uranium carbide ImageFile NaCl polyhedra.png ImageName Uranium carbide IUPACName Uranium carbide Section1 Chembox Identifiers CASNo Ref cascite correct CAS CASNo 12070 09 6 Section2 Chembox Properties Formula UC MolarMass 250.04 g mol Density 13.63 g cm sup 3 sup MeltingPt 2350 C ref Ma, Benjamin. Nuclear Reactor Materials and Applications . Van Nostrand Reinhold Co, 1983, p. 167. ref Section3 Chembox Structure CrystalStruct cubic , Pearson ... 2010 Uranium carbide , a carbide of uranium , is a hard refraction metallurgy refractory ceramic material. It comes in several stoichiometric stoichiometries Uranium Carbon sub x sub , such as uranium monocarbide UC , CAS number 12070 09 6 , uranium sesquicarbide U sub 2 sub C sub 3 sub , CAS number ..., 1959, 12 , 159 161. ref and uranium dicarbide UC sub 2 sub , CAS number 12071 33 9 . ref Uranium ..., Acta Crystallographica, 1966, 21 , 670 671. ref Like uranium dioxide and some other uranium compounds, uranium carbide can be used as a nuclear fuel for nuclear reactor s, usually in the form of pellets or tablets. Uranium carbide fuel was used in late designs of nuclear thermal rocket s. Uranium ... uses uranium dioxide instead. As nuclear fuel, uranium carbide can be used either on its own, or mixed with plutonium carbide PuC and Pu sub 2 sub C sub 3 sub . The mixture is also labeled as uranium plutonium carbide UPuC . Uranium carbide is also a popular target material for particle accelerator s. Ammonia synthesis from nitrogen and hydrogen is sometimes accomplished in the presence of uranium carbide acting as a catalyst. ref Hutchings, G. J., et al., Uranium oxide based catalysts for the destruction ... & abstract of paper talk about uranium oxide. ref See also Uranium boride Thorium carbide References reflist DEFAULTSORT Uranium Carbide Category Carbides Category Uranium compounds Category Nuclear materials Inorganic compound stub fr carbure d uranium ... more details
Image U,92.jpg thumb Uranium In materials science and materials engineering , uranium metallurgy is the study of the physical and chemical behavior of uranium and its alloy s. Commercial grade uranium can be produced through the Redox reduction of uranium halide s with alkali or alkaline earth metal s. Uranium metal can also be made through electrolysis of potassium K U fluorine F sub 5 sub or UF sub 4 sub , dissolved in a molten Calcium chloride CaCl sub 2 sub and Sodium chloride NaCl . Very pure uranium can be produced through the thermal decomposition of uranium halides on a hot filament. The uranium isotope uranium 235 sup 235 sup U is used as the fuel for nuclear reactor s and nuclear weapon s. It is the only isotope existing in nature to any appreciable extent that is fissile, that is, fissionable by thermal neutrons. The isotope uranium 238 sup 238 sup U is also important because it absorbs neutrons to produce a radioactive isotope that subsequently decays to the isotope 239Pu plutonium , which also is fissile. Uranium in its natural state comprises just 0.71 sup 235 sup U and 99.3 sup 238 sup U, and the main focus of uranium metallurgy is the enriched uranium enrichment of uranium through isotope separation . Sources Uranium Enriched uranium Nuclear weapon design The technology of mining and metallurgy http www.unu.edu unupress unupbooks uu29me uu29me08.htm , retrieved 7 October 2005. See also Nuclear weapon design Enriched materials External links http www.unu.edu unupress unupbooks uu29me uu29me08.htm The technology of mining and metallurgy http legacystory.apps.em.doe.gov text close close2.htm Building nuclear warheads The process http web.ead.anl.gov uranium guide ucompound propertiesu table1.cfm List of Uranium Alloys Category Uranium ... more details
Infobox company company name Uranium One Inc. company logo Image Uranium One logo.svg 200px company type ... people Neal J. Froneman industry Uranium , Gold products revenue parent ARMZ Uranium Holding Co. 51 ... CA UUU&page quotesearch title Company Profile for Uranium One Inc CA UUU accessdate 2008 10 10 ref market cap 487 million USD ref name zenobank homepage http www.uranium1.com www.uranium1.com Uranium One TSX UUU , jse UUU also known as sxr Uranium One is a Canada Canadian based uranium mining company ... Cross Resources Inc. and Aflease Gold and Uranium Resources Ltd announced that they will merge under the name SXR Uranium One Inc. ref http www.wise uranium.org ucscr.html WISE Uranium Project ref In June 2009, the Russian uranium mining company ARMZ Uranium Holding Co. ARMZ , a part of Rosatom , acquired 16.6 of shares in Uranium One in exchange of 50 in Karatau uranium mining project, a joint ... nuclear news.org newsarticle.aspx?id 25418&terms ARMZ title Kazakh tie in for Uranium One and ARMZ date 2009 06 15 accessdate 2009 06 24 ref In June 2010, Uranium One acquired 50 and 49 respective interests in southern Kazakhstan based Akbastau and Zarechnoye uranium mines from ARMZ. In exchanges ARMZ increased its stake in Uranium One up to 51 . The acquisition results in a 60 annual production increase at Uranium One, from about 10 million to 16 million lb. ref http www.uranium1.com uploads articles UUU 20Press 20Release 20June 208 202010 FINAL.pdf Uranium One to Acquire Two More Kazakh ... takes hold of Uranium One 0906107.html title ARMZ takes hold of Uranium One date 2010 06 09 accessdate ... wnn090610 In case the transaction is approved, Uranium One will pay its minority shareholders a hefty dividend of at least 1.06 United States Dollars by the end of 2010. See also List of uranium mines Uranium Participation Corporation References Reflist External links http www.uranium1.com Official ... profile Portal Companies Category Uranium mining companies of Canada Category S&P TSX Composite ... more details
chembox verifiedrevid 402839146 Name Uranium sulfate ImageFile Uranium sulfate.jpg ImageSize 200px ImageName Uranium sulfate OtherNames Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 11383849 InChI 1 H2O4S.U c1 5 2,3 4 h H2,1,2,3,4 q 2 p 2 InChIKey SMWCBVIJCHHBAU NUQVWONBAD SMILES U 2 . O S O O O StdInChI Ref stdinchicite correct chemspider StdInChI 1S H2O4S.U c1 5 2,3 4 h H2,1,2,3,4 q 2 p 2 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey SMWCBVIJCHHBAU UHFFFAOYSA L CASNo Section2 Chembox Properties Formula U SO sub 4 sub sub 2 sub MolarMass 430.15 g mol Density Solvent SolubleOther MeltingPt BoilingPt Uranium sulfate U SO sub 4 sub sub 2 sub is a water soluble salts salt of uranium . It is a very toxic Chemical compound compound and should not be ingested. Uranium sulfate minerals commonly are widespread around uranium bearing mine sites, where they usually form during the evaporation of acid sulfate rich mine tailings which have been leached by oxygen bearing waters. Uranium sulfate is a transitional compound in the production of Uranium hexafluoride . It was also used to fuel aqueous Homogeneous Reactor s Preparation Uranyl sulfate in solution is readily photochemically reduced to uranium IV sulfate. The photoreduction can be carried out in the sunshine and this requires the addition of ethanol as a reducing agent. Uranium IV crystallizes or is precipitated by ethanol in excess. It can be obtained with different degrees of hydration. References Citation style date September 2007 reflist cite journal author Mata F., Mart n Gil J. and Mart n Gil F.J. title Preparation, infrared and visible spectra of sulfate complexes of uranium IV journal Z. Anorg. Allg. Chem year 1980 volume 462 pages 231 240 doi 10.1002 zaac.19804620127 DEFAULTSORT Uranium Sulfate Category Uranium compounds Category Sulfates Uranium compounds Inorganic compound stub ... more details
Natural uranium NU refers to refined uranium with the same isotopic ratio as found in nature. It contains 0.7 uranium 235 , 99.3 uranium 238 , and a trace of uranium 234 by weight. In terms of the amount of radioactivity , approximately 2.2 comes from uranium 235, 48.6 uranium 238, and 49.2 uranium 234. Natural uranium can be used to fuel both low and high power reactors. Historically, graphite moderated reactors and heavy water moderated reactors have been fueled with natural uranium in the pure metal U or uranium dioxide UO sub 2 sub ceramic forms, however experimental fuelings with uranium trioxide UO sub 3 sub and triuranium octaoxide , U sub 3 sub O sub 8 sub have shown promise. http www.ornl.gov webworks cppr y2001 rpt 115351.pdf The 0.72 U 235 is not sufficient to produce a self sustaining critical chain reaction in light water reactor s or nuclear weapon s these applications must use enriched uranium . In rare occasions, earlier in geologic history when U 235 was more abundant, uranium ore was found to have naturally engaged in fission, forming natural nuclear fission reactor s. During the Manhattan Project , the name Tuballoy was used to refer to natural uranium in the refined condition this term is still in occasional use at present. See also Depleted uranium Enriched uranium Oralloy Nuclear engineering Nuclear fuel cycle Nuclear physics Nuclear reactor Nuclear weapon Natural nuclear fission reactor Oklo reactor List of uranium mines External links http www.nuclearfaq.ca brat fuel.htm The evolution of CANDU fuel cycles References Design Parameters for a Natural Uranium Fueled Nuclear Reactor, C. M. Hopper et al. , ORNL TM 2002 240, November 2002. Category Uranium ko ja ... more details
Reprocessed uranium RepU is the uranium recovered from nuclear reprocessing , as done commercially in France, the UK and Japan and by nuclear weapons states military plutonium production programs. This uranium actually makes up the bulk of the material separated during reprocessing. Commercial LWR spent nuclear fuel contains on average excluding Cladding nuclear fuel cladding only four percent plutonium , minor actinides and fission products by weight. Reuse of reprocessed uranium has not been common because of low prices in the uranium market of recent decades, and because of the undesirable isotopic contaminants uranium 236 which absorbs neutrons without fissioning and becomes neptunium 237 which is one of the most difficult isotopes for long term disposal in a deep geological repository , uranium 232 whose decay products emit strong gamma radiation making handling more difficult , and uranium 234 which is fertile material but can affect reactivity differently than uranium 238 . ref http www.francenuc.org en mat uranium4 e.htm Uranium from reprocessing ref In the last few years uranium prices have risen again, and if the price becomes high enough, it is possible that reprocessed uranium will be re enriched uranium enriched and reused. A higher enrichment level will be required to compensate ... use, reprocessed uranium, like depleted uranium , will be usable in their breeding blankets. There have been some studies involving the use of reprocessed uranium in CANDU reactors. CANDU is designed to use natural uranium as fuel the U 235 content remaining in spent PWR BWR fuel is typically greater than that found in natural uranium, allowing the re enrichment step to be skipped. Fuel ... Basis Idaho National Laboratory Module K2 Aqueously Reprocessed Uranium Conversion and Disposition Module K3 Pyrochemically Pyrometallurgically Reprocessed Uranium Conversion and Disposition Nuclear Technology Category Actinides Category Nuclear materials Category Nuclear reprocessing Category Uranium ... more details
Refimprove date December 2009 File Yellowcake.jpg thumb 230px Yellowcake , a mixture of uranium oxides. Uranium oxide is an oxide of the element uranium . The metal uranium forms several oxides Uranium dioxide or uranium IV oxide UO sub 2 sub , the mineral Uraninite or pitchblende Uranium trioxide or uranium VI oxide UO sub 3 sub Triuranium octoxide U sub 3 sub O sub 8 sub , the most stable uranium oxide, yellowcake typically contains 70 to 90 percent triuranium octoxide Uranyl peroxide UO sub 2 sub O sub 2 sub or UO sub 4 sub Uranium dioxide is oxidized in contact with oxygen to form triuranium octoxide. 3 UO sub 2 sub O sub 2 sub U sub 3 sub O sub 8 sub at 700 C 970 K Preparation 38 During World War II Preparation 38 was the codename for uranium oxide used by the German scientists. ref Per F. Dahl, Heavy water and the wartime race for nuclear energy Institute of Physics Publishing, London 1999 , p. 135 ref Fibonacci Relation The compounds of Uranium Oxide are always paired up together in Fibonacci numbers References Reflist DEFAULTSORT Uranium Oxide Category Oxides Inorganic compound stub ca xid d urani de Uranoxid fr Oxyde d uranium ko it Ossido di uranio pl Tlenki uranu ru ... more details
Eka uranium may refer to Unbiquadium Ubq , an unsynthesized chemical element with atomic number 124 Unquadbium Uqb , an unsynthesized chemical element with atomic number 142 See also Uranium Eka protactinium disambiguation Eka thorium disambiguation disambig ... more details
Uranium tailings are a waste byproduct tailings of uranium mining . In mining, the raw uranium ore is brought to the surface and crushed into a fine sand. The valuable uranium bearing minerals are then mechanically removed, and the remaining radioactive sand, called uranium tailings , is stored in huge impoundments. If these uranium tailings are left on the surface and allowed to dry out, the radioactive sand can be carried great distances by the wind, entering the food chain and bodies of water. The danger posed by such sand dispersal is uncertain at best given the dilution effect of dispersal. The majority of tailing mass will be inert rock, just as it was in the raw ore before the extraction of the uranium, but physically altered, ground up, mixed with large amounts of water and exposed to atmospheric oxygen, which can substantailly alter chemical behaviour. Uranium tailings contain over a dozen radioactive nuclides, which are the primary hazard posed by the tailings. The most important of these are thorium thorium 230 , radium radium 226 , radon radon 222 radon gas and the daughter isotopes of radon decay, including polonium polonium 210 . An EPA estimate of risk based on uranium tailings deposits existing in the United States in 1983 gave the figure of 500 lung cancer deaths per century, if no countermeasures are taken. ref cite web url http www.wise uranium.org uwai.html TAILHAZ title Uranium Mining and Milling Wastes An Introduction author Peter Diehl accessdate 2009 10 02 ref This unit of reporting the risk greatly underestimates risk to local populations. See also List of uranium mines References reflist DEFAULTSORT Uranium Tailings Category Radioactive waste chem stub ... more details
chembox Name Uranium nitride ref cite journal title Fabrication and testing of uranium nitride fuel for space power reactors author R. B. Matthews, K. M. Chidester, C. W. Hoth, R. E. Mason, R. L. Petty journal Journal of Nuclear Materials volume 151 issue 3 year 1988 pages 345 doi 10.1016 0022 3115 88 90029 3 ref IUPACName Uranium nitride ImageFile La2O3structure.jpg Section1 Chembox Identifiers CASNo 12033 83 9 Section2 Chembox Properties Formula U sub 2 sub N sub 3 sub MolarMass 518.078 g mol Appearance crystalline solid Density 11300 kg m 3, Solid Solubility 0.08 g 100 ml 20 C MeltingPt 900 C decomposes to UN BoilingPt Decomposes Section3 Chembox Structure CrystalStruct Hexagonal, Pearson symbol hP5 SpaceGroup P 3m1, No. 164 Uranium nitride refers to a family of several ceramic compounds uranium mononitride UN , uranium sesquinitride U sub 2 sub N sub 3 sub , which exists in either an alpha or beta phase, and uranium dinitride UN sub 2 sub . Uranium mononitride is used as nuclear fuel in some nuclear reactor nuclear test reactor s, because it has some properties similar to uranium dioxide or uranium carbide . The property which makes uranium mononitride highly attractive as a nuclear fuel is its thermal conductivity, which is on the order of 4 8 times higher than that of uranium ..., which limits fuel lifetime. Uranium nitride can be synthesized by the reaction of nitrogen with uranium .... 126 ref Uranium nitride may be formed as a minor product of uranium combustion in air however, the more thermodynamically stable uranium dioxide will be the major product. According to an article in Nuclear Engineering International , uranium nitride enriched to less than 20 U 235 is the fuel chosen ... Ltd. language English accessdate 29 November 2009 ref This article, however, incorrectly states that uranium sesquinitride will be used, rather than uranium mononitride. The correct information is available ... Uranium compounds inorganic compound stub fr Trinitrure de diuranium ja pl Triazotek diuranu ... more details
Image 2007Uranium.PNG thumb right 350px 11 countries are responsible for 97 of the global uranium extraction in 2007. The uranium market , like all commodity market s, has a history of volatility, moving .... The only significant commercial use for uranium is to fuel nuclear reactor s for the generation of electricity ... 2006 . Before uranium is ready for use as nuclear fuel in reactors, it must undergo a number of intermediary processing steps which are identified as the front end of the nuclear fuel cycle uranium ... uranium enriching it and finally Nuclear fuel fuel fabrication to produce fuel assemblies or bundles ... of the market that has evolved to provide these three services. Available supply Main Uranium mining Peak uranium Image MonthlyUraniumSpot.png thumb right 260px Monthly uranium spot price in US per pound. The Uranium bubble of 2007 2007 price peak is clearly visible. ref name uraniumingo cite web author date title NUEXCO Exchange Value Monthly Uranium Spot url http www.uranium.info index.cfm?go c.page&id 29 work publisher accessdate ref Image Uranium resources.svg thumb 260px The Estimate of Available Uranium depends on what resources are included in the estimate. The squares represent relative ... Pedia cite book last Herring first J. S. year 2004 chapter Uranium and thorium resource assessment ... Uranium 2005 Resources, Production and Demand url http www.oecdbookshop.org oecd display.asp?sf1 identifiers&st ... The world s present measured resources of uranium, economically recoverable at a price of USD 130 kg ... Cohen physicist Bernard Cohen proposed that the world supply of uranium is effectively inexhaustible ... breeder reactor s, fueled by naturally replenished uranium extracted from seawater, could supply ... cohen83 These reactors use uranium 238 , which is more common than the uranium 235 required by conventional reactors. Market operations Unlike other metals such as copper or nickel, uranium is not traded ... agreement to provide for the trade of on and off exchange uranium futures contracts. The structure of uranium ... more details
Image Ranger Uranium Mine in Kakadu National Park.jpg thumb right The Ranger Uranium Mine in Australia. Image 2007Uranium.PNG thumb right thumb 2007 uranium mining, by nationality. Data is taken from http www.world nuclear.org info inf23.html . Uranium mining is the process of extraction of uranium ore from the ground. As uranium ore is mostly present at relatively low concentrations, most uranium ... because sufficiently high uranium concentrations to motivate mining at current prices are rare. The worldwide production of uranium in 2009 amounted to 50,572 tonne s, of which 27 was mined in Kazakhstan ... uranium production. Other important uranium producing countries in excess of 1000 tonnes per year ... http www.world nuclear.org info inf23.html title World Uranium Mining publisher World Nuclear Association accessdate 2010 06 11 ref A prominent use of uranium from mining is as fuel for nuclear power plant s. As of 2008, known uranium ore resources that can be mined at about current costs are estimated ... cite web url http www.nea.fr html general press 2008 2008 02.html title Uranium resources sufficient ... Energy Agency NEA quote Uranium 2007 Resources, Production and Demand , also known as the Red Book, estimates the identified amount of conventional uranium resources which can be mined for less than ... of money. Undiscovered resources, i.e. uranium deposits that can be expected to be found based ... by higher prices. accessdate 2008 06 16 ref After mining uranium ores, they are normally processed ... the uranium by chemical leaching. The milling process commonly yields dry powder form material consisting of natural uranium, yellowcake , which is sold on the uranium market as U sub 3 sub O sub 8 sub . History Uranium minerals were noticed by miners for a long time prior to the discovery of uranium in 1789. The uranium mineral pitchblende, also known as uraninite , was reported from the Erzgebirge ... and 1763 in Schwarzwald . ref Franz J. Dahlkamp 1993 Uranium ore deposits Springer Verlag ... more details
Image U glass above.jpg thumb A uranium glass cakeplate 300 px Image U glass with black light.jpg thumb 300px Uranium glass glowing under UV light Image Vacuum capacitor with uranium glass.jpg thumb Uranium glass used as lead in seals in a vacuum capacitor Uranium glass is glass which has had uranium ... from trace levels to about 2 by weight uranium, although some 19th century pieces were made with up to 25 uranium. ref Big Book of Vaseline Glass, by Barrie Skelcher, Pub. Schiffer ref ref http www.orau.org ptp collection consumer 20products vaseline.htm Vaseline and uranium glass ca. 1930s ref Uranium glass was once made into tableware and household items, but fell out of widespread use when the availability of uranium to most industries was sharply curtailed during the Cold War . Most such objects ... in Glass Glass art art glassware . Otherwise, modern uranium glass is now mainly limited to small ... of uranium glass ranges from yellow to green depending on the oxidation state and concentration of the metal ... Colors glass colorants . Uranium glass also fluorescence fluoresces bright green under ultraviolet ... most pieces of uranium glass are considered to be harmless and only negligibly radioactive . ref cite journal last Betti first Maria title Civil use of depleted uranium journal Journal of Environmental ... pmid 12500798 issue 2 3 ref Vaseline glass The most typical color of uranium glass is pale yellowish ... still define vaseline glass as transparent or semitransparent uranium glass in this specific color. Vaseline glass is now frequently used as a synonym for any uranium glass, especially in the United ... uranium content which requires a blacklight test to verify the characteristic green fluorescence ... other common subtypes of uranium glass have their own nicknames custard glass opaque or semiopaque ... applied on the basis of superficial appearance rather than uranium content. Similarly, Depression ... Depression regardless of appearance or formula. Image Uranium Glass Collection.jpg thumb left A collection ... more details
Infobox Company company name Star Uranium company logo company type Public company Public br tsxv SUV genre foundation 1985 this parameter modifies Founded founder location city Saskatoon location country flagicon CAN Canada key people Kyle Kozuska ref name zenobank cite web url http www.zenobank.com index.php?symbol CA SUV&page quotesearch title Company Profile for Star Uranium Corp CA SUV accessdate 2008 10 16 ref industry Mining products Uranium br Diamond revenue net income divisions homepage http www.staruranium.com www.staruranium.com Star Uranium is a Canada Canadian resource company with its head office in Saskatoon , Saskatchewan . The company is focused on the acquisition, exploration and development of uranium , diamond and other precious metal properties. Properties Uranium Alexander Lake , Saskatchewan Collins Bay , Saskatchewan Cree Lake , Saskatchewan David Lake , Saskatchewan Pardoe Lake , Saskatchewan Stony Rapids , Saskatchewan Diamond Fort la Corne Provincial Forest Fort la Corne , Saskatchewan Peace River Buffalo Head Hills , Alberta Zama Lake , Alberta Other precious metals Anglo Rouyn , Saskatchewan Disputes Since June 2003 the company together with sister company United Uranium had a dispute with Shore Gold over ownership of 25 groups of mineral claims totaling over 35,000 hectares in the Fort la Corne area of Saskatchewan. The issue was all about who was first in line at the Department of Mineral Resources of the Government of Saskatchewan to register mineral deposit claims. On March 1, 2007 a Saskatchewan court ruled in favor of Star Uranium but on March 30, 2007 Shore Gold appealed the court ruling. On July 9, 2008, the Court of Appeal for Saskatchewan ruled that Star Uranium and United Uranium were entitled to register mineral claims to 25 blocks of land in the Fort la Corne area. References reflist Category Uranium mining companies of Canada Category Diamond mining companies of Canada Category Companies based in Saskatoon ... more details
chembox verifiedrevid 409010929 Name Uranium dioxide ImageFile UO2lattice.jpg IUPACName Uranium dioxide br Uranium IV oxide OtherNames Urania br Uranous oxide Section1 Chembox Identifiers CASNo 1344 57 ... OtherFunctn Triuranium octoxide br Uranium trioxide Function uranium oxide s OtherCpds Uranium dioxide or uranium IV oxide Uranium Oxygen sub 2 sub , also known as urania or uranous oxide , is an oxide of uranium , and is a black, radioactive, crystalline powder that naturally occurs in the mineral uraninite . It is used in nuclear fuel rods in nuclear reactors . A mixture of uranium and plutonium ... ceramic glaze glaze s and glass . Production Uranium dioxide is produced by reducing uranium trioxide ... This reaction takes part in the Nuclear reprocessing reprocessing of nuclear fuel and enriched uranium enrichment of uranium for nuclear fuel. Chemistry Structure The solid is isostructural with has ... have the same structures. Oxidation Uranium dioxide is oxidized in contact with oxygen to the triuranium ... electrochemistry The electrochemistry of uranium dioxide has been investigated in detail as the galvanic corrosion of uranium dioxide controls the rate at which used nuclear fuel dissolves. See the spent nuclear fuel page for further details. Oxidation of uranium metal It has been reported that water causes the rate of the oxidation of both plutonium and uranium metal to increase when compared ... Hydrogen Mixtures Mechanisms for Corrosion of Uranium and Plutonium accessdate 2009 06 06 ref Uses File FuelPellet1.jpg thumb left Uranium oxide fuel pellet Nuclear Fuel UO sub 2 sub is used mainly ... conductivity of uranium dioxide is very low when compared with uranium , uranium nitride , uranium ... The thermal conductivity of zirconium metal and uranium dioxide as a function of temperature Image ... C gallery Color for ceramics glaze All uranium oxides were used to color glass and ceramics. Uranium ... when fired with oxygen. Orange colored Fiestaware is a well known example of a product with a uranium ... more details
Infobox Company company name United Uranium company logo company type Public company Public br tsxv UUC genre foundation 1985 this parameter modifies Founded founder location city Saskatoon location country flagicon CAN Canada key people Eric Wray ref name zenobank cite web url http www.zenobank.com index.php?symbol CA UUC&page quotesearch title Company Profile for United Uranium Corp CA UUC accessdate 2008 10 17 ref industry Mining products Uranium br Diamond br Gold revenue net income divisions homepage http www.uniteduranium.com www.uniteduranium.com United Uranium formerly known as United Carina Resource is a Canada Canadian resource company with its head office in Saskatoon , Saskatchewan . The company is focused on the acquisition, exploration and development of natural resources such as uranium , diamond , copper and other precious metal s. Properties Uranium Hatchet Lake , Saskatchewan , Denison Mines , 50 South Bear Project , Saskatchewan Diamond Fort la Corne Provincial Forest Fort la Corne , Saskatchewan, Star Uranium, 50 Peace River Buffalo Head Hills , Alberta , Star Uranium, 50 Other precious metals Gold Anglo Rouyn , Saskatchewan, Star Uranium, 50 Pine Lake , Saskatchewan, Claude Resources , 50 Disputes Since June 2003 the company together with sister company Star Uranium had a dispute with Shore Gold over ownership of 25 groups of mineral claims totaling over 35,000 hectares in the Fort la Corne area of Saskatchewan. The issue was all about who was first in line at the Department of Mineral Resources of the Government of Saskatchewan to register mineral deposit claims. On March 1, 2007 a Saskatchewan court ruled in favor of United Uranium but on March 30, 2007 Shore Gold appealed to the court ruling. On July 9, 2008 the Court of Appeal for Saskatchewan ruled that United Uranium and Star Uranium were entitled to register mineral claims to 25 blocks of land in the Fort la Corne area. References reflist Category Uranium mining companies of Canada ... more details
Uranium production is an important part of the African economy , with Niger , Namibia and South Africa creating up to 18 of the world s annual production. Many African countries produce uranium or have untapped uranium ore deposits . ref http www.bgs.ac.uk mineralsuk downloads comm profile uranium.pdf ref List flagicon Algeria Algeria Tamanrasset ref http www.magharebia.com cocoon awi xhtml1 en GB features awi features 2005 10 03 feature 01 ref flagicon Angola Angola Cabinda Province ref http www.afrol.com articles 18320 ref flagicon Botswana Botswana Mokobaesi Letlhakane Project A Cap Resources ref http allafrica.com stories 200801090850.html ref ref http www.acap.com.au companyprofile.htm ref flagicon Democratic Republic of the Congo Democratic Republic of the Congo Kolwezi Shinkolobwe Shinkolobwe mine closed 2004 flagicon Gabon Gabon Several List of uranium mines Closed uranium mines closed uranium mines exist in Gabon. Franceville Mounana closed Franceville Oklo closed flagicon Namibia ... in the Air Mountains of Agadez Region . Arlit Uranium industry Arlit , Areva NC Iferouane , Areva NC Imouraren Areva SA ref http beta.miningreview.com node 12757 ref Niger Uranium ltd ref http www.niger uranium.com ref flagicon Nigeria Nigeria Mining in Nigeria Uranium flagicon South Africa South ... project AngloGold Ashanti s East Rand Gold and Uranium operation ERGO gold and uranium joint venture with DRDGold ref http mintails.com resources uranium ref ref http mintails.com operations ergo ref First Uranium , listed on the Johannesburg Securities Exchange symbol FIU ref http www.firsturanium.com ... ref sxrUraniumOne formerly the JSE listed Aflease Gold Dominion project gold and uranium ref ... Economy of Africa List of uranium mines Uranium market External links http allafrica.com AllAfrica News http www.wise uranium.org upafr.html WISE Uranium Project New Uranium Projects Africa http ... Uranium Category Mining in Africa ... more details
chembox verifiedrevid 402839304 Name Uranium tetrafluoride ImageFile Kristallstruktur Uran IV fluorid.png ImageSize 200px IUPACName Uranium IV fluoride br Uranium tetrafluoride OtherNames Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 14676181 InChI 1 4FH.2U ... c, No. 15 Section7 Chembox Hazards ExternalMSDS http physchem.ox.ac.uk MSDS UR uranium tetrafluoride.html ... Related OtherAnions Uranium IV chloride br Uranium IV bromide br Uranium IV iodide OtherCations ... Uranium hexafluoride br Uranium dioxide Uranium tetrafluoride UF sub 4 sub is a green crystalline solid compound of uranium with an insignificant vapor pressure and very slight solubility in water. Uranium in its tetravalent uranous state is very important in different technological processes. In the uranium refining industry it is known as green salt . UF sub 4 sub is generally an intermediate in the conversion of uranium hexafluoride UF sub 6 sub to either uranium oxide s U sub 3 sub O sub 8 sub or UO sub 2 sub or uranium metal. It is formed by the reaction of UF sub 6 sub with hydrogen gas in a vertical tube type reactor or by the action of hydrogen fluoride HF on uranium dioxide . UF sub 4 sub is less stable than the uranium oxides and reacts slowly with moisture at ambient temperature ... 4.5 g cm sup 3 sup depending on the production process and the properties of the starting uranium compounds ... efficiency, lower vapor pressure and better chemical stability. Like all uranium salts UF ... Ergen W.,Heath R. E. title Uranium Tetrafluoride journal Journal of the American Chemical Society ... links http web.ead.anl.gov uranium guide ucompound propertiesu tetrafluoride.cfm Uranium Tetrafluoride, Appendix A of the PEIS DOE EIS 0269 Uranium compounds DEFAULTSORT Uranium Tetrafluoride Category Uranium compounds Category Nuclear materials Category Fluorides Category Metal halides Category Inorganic compounds de Uran IV fluorid fr T trafluorure d uranium pl Fluorek uranu IV ru ... more details
Unreferenced date February 2008 Uranium tiles have been used in the glazing industry for many centuries, as uranium oxide makes an excellent ceramic glaze , and is reasonably abundant on the earth s crust. Not long after Henri Becquerel discovered radioactivity in uranium salts, Madame Curie discovered both polonium and radium as two new radioactive elements also present with uranium. The relatively high specific activity and moderate half life of 1,600 years of Ra 226 , the main radioisotope of radium found in uranium ore, made for a material which when mixed with a phosphor allowed for a glow in the dark substance. Thus, in addition to its medical usage, radium usage also became a major industry in the 1920s and 1930s for making watch, clock and aircraft dials. The radium dial painters brought a certain degree of notoriety to the abuse of radioactive materials, and that precautions needed to be followed with this new substance. Because it takes approximately 3 metric ton s of uranium to extract 1 gram of Ra 226, prodigious quantities of uranium were mined to sustain this new industry. The uranium ore itself was a waste product of this industry. By some estimates, nearly one million tons of uranium were mined to support this industry. Taking advantage of this now abundant resource, the tile and pottery glazing industry now had a relatively inexpensive and abundant source of glazing material that produced a wide variety of colors depending upon admixtures, firing, etc. Vibrant colors of orange, yellow, red, green, blue, black, mauve, etc. were produced on tiles and other ceramic ... amounts of uranium. These can now be readily found in older homes, apartments, and other buildings ... emitted by uranium s ever present decay chain radio daughters. In most situations, the radiation exposure is not excessive, but there are some exceptions in which pure uranium oxide which produces ... for hours on end, day after day. Category Uranium ... more details
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