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Topic: Uranium oxide

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	Uranium oxide - Wikipedia, the free encyclopedia
		Uranium oxide is an oxide of the element uranium.
		Uranium dioxide or uranium(IV) oxide (UO, the mineral Uraninite or pitchblende)
		Uranium dioxide is oxidized in contact with oxygen to the triuranium octaoxide.
	en.wikipedia.org /wiki/Uranium_oxide (82 words)

	Uranium
		Uranium can be prepared by the reduction of uranium halides with alkali or alkaline earth metals or by reducing uranium oxides by calcium, aluminium, or carbon at high temperatures.
		Uranium, high purity, may be prepared by the thermal decomposition of uranium halides on a hot filament.
		Uranium yellow (termed also as yellow oxide) with formula Na O is used for yellow and greenish glazing enamels and to impart an opalescent yellow to glass, which is green in reflected light.
	www.azom.com /Details.asp?ArticleID=604 (721 words)

	Uranium Oxide Glaze (Site not responding. Last check: 2007-11-04)
		Uranium is ubiquitous, we are surrounded by minute quantities of it which we breathe in and ingest daily, and which we eliminate from our bodies vie our feces and urine daily.
		The general population is exposed to uranium primarily through food and water; the average daily intake of uranium from food ranges from 0.07 to 1.1 micrograms per day.
		Depleted uranium is 40 percent less radioactive than the natural uranium that we all eat, drink, and breathe daily.
	www.handspiral.com /Uranium.htm (1398 words)

	WHO \| Depleted uranium
		Of the uranium that is absorbed into the blood, approximately 70% will be filtered by the kidney and excreted in the urine within 24 hours; this amount increases to 90% within a few days.
		Although uranium released from embedded fragments may accumulate in the central nervous system (CNS) tissue, and some animal and human studies are suggestive of effects on CNS function, it is difficult to draw firm conclusions from the few studies reported.
		When the solubility characteristics of the uranium compounds are not known, which is often the case in exposure to DU, it would be prudent to apply 0.5 µg per kg of body weight per day for ingestion.
	www.who.int /mediacentre/factsheets/fs257/en (1959 words)

	sociology - Uranium (Site not responding. Last check: 2007-11-04)
		Because uranium ores emit radon gas, and their harmful and highly radioactive daughter products, uranium mining is significantly more dangerous than other (already dangerous) hard rock mining, requiring adequate ventilation systems if the mines are not open pit.
		The decay of uranium and its nuclear reactions with thorium in the Earth's core is thought to be the source for much of the heat that keeps the outer core liquid, which in turn drives plate tectonics.
		Uranium ore is rock containing uranium mineralization in concentrations that can be mined economically, typically 1 to 4 pounds of uranium oxide per ton or 0.05 to 0.20 percent uranium oxide.
	www.aboutsociology.com /sociology/Uranium (2808 words)

	Uranium Production - Nuclear Weapons
		Uranium can be prepared by reducing uranium halides with alkali or alkaline earth metals or by reducing uranium oxides by calcium, aluminum, or carbon at high temperatures.
		Uranium is used in inertial guidance devices, in gyro compasses, as counterweights for aircraft control surfaces, as ballast for missile reentry vehicles, and as a shielding material.
		Uranium tetrachloride is produced by the reaction of carbon tetrachloride (CCl 4) with pure UO 2 at 700 °F. Many countries around the world have extracted uranium from its ores or from yellowcake.
	www.fas.org /nuke/intro/nuke/uranium.htm (6776 words)

	IEER Factsheet \| Uranium
		Uranium is the principal fuel for nuclear reactors and the main raw material for nuclear weapons.
		The property of uranium important for nuclear weapons and nuclear power is its ability to fission, or split into two lighter fragments when bombarded with neutrons releasing energy in the process.
		Uranium is generally used in reactors in the form of uranium dioxide (UO) or uranium metal; nuclear weapons use the metallic form.
	www.ieer.org /fctsheet/uranium.html (1325 words)

	Uranium Radiation Properties
		Uranium mill tailings are the residual waste from the process of uranium extraction from the uranium ore.
		Compared to uranium ore, the alpha radiation of uranium mill tailings and thus the radiation hazard on ingestion or inhalation of tailings (dust) is approx.
		This is obtained from the uranium ore concentrate by refining and conversion.
	www.wise-uranium.org /rup.html (2821 words)

	uranium
		Uranium can be made by reducing uranium halides with alkali or alkaline earth metals or by reducing uranium oxides by calcium, aluminum, or carbon at high temperatures.
		Uranium in the skeleton is believed to be roughly in equilibrium with intake.
		Uranium sorption is likely due to its reduction from the hexavalent state, where it is introduced via surface waters, to the tetravalent state found in the confined aquifers.
	www.speclab.com /elements/uranium.htm (1813 words)

	DOE-HDBK-1081-94; Primer on Spontaneous Heating and Pyrophoricity
		Uranium in finely divided form is readily ignitable, and uranium scrap from machining operations is subject to spontaneous ignition.
		Uranium surfaces treated with concentrated nitric acid are subject to explosion or spontaneous ignition in air.
		Uranium fires should be extinguished with the same techniques and precautions as plutonium fires (see corresponding paragraph on plutonium).
	www.eh.doe.gov /techstds/standard/hdbk1081/hbk1081e.html (4659 words)

	Uranium oxide - The production Process - from blasting to shipping - Rossing Uranium Mine
		Manganese and iron oxide are added to oxidise the uranium from the insoluble to the soluble state in order to improve the extraction of uranium from the rock.
		A clear uranium bearing solution ("pregnant" solution) overflows from no.1 thickener, while the washed slime is mixed with the sands and pumped to the tailings area.
		The drums of uranium oxide are loaded and exported to overseas converters for further processing.
	www.rossing.com /uranium_production.htm (853 words)

	Uranium oxide - A source of energy for nuclear power (via CobWeb/3.1 planetlab2.isi.jhu.edu) (Site not responding. Last check: 2007-11-04)
		Uranium is one of the most powerful natural energy sources known to humankind.
		The Rössing uranium deposit is situated some 65 kilometres east of the coastal town of Swakopmund.
		Rössing is the largest known uranium ore deposit of its kind and has a geological history dating back 700 million years to when the Namib Desert formed part of the sea.
	www.rossing.com.cob-web.org:8888 /uranium.htm (589 words)

	Uranium
		Uranium is now indelibly associated with atom bombs and nuclear power, but was a chemical curiosity of little importance for a hundred years after its discovery.
		Uranium was found to have the atomic weight of 238.07, the greatest of any element, and was assigned the symbol U. A fresh surface of metallic uranium is white and lustrous, with a bluish tinge, but it soon tarnishes in air.
		Uranium is, therefore, an electron donor, easily oxidized, and exhibits valences of +3, +4, +5 and +6, with +4 (uranous) and +6 (uranyl) being the most prominent.
	www.du.edu /~jcalvert/phys/uranium.htm (7783 words)

	Uranium Hexafluoride (UF6) (Site not responding. Last check: 2007-11-04)
		Uranium hexafluoride is a chemical compound consisting of one atom of uranium combined with six atoms of fluorine.
		The gaseous diffusion process used to enrich uranium requires uranium in the form of UF In the first step of UF production, uranium ore is mined and sent to a mill where uranium oxide (often called "yellowcake") is produced.
		At the production facility, the uranium oxide is combined with anhydrous HF and fluorine gas in a series of chemical reactions to form the chemical compound UF The product UF is placed into steel cylinders and shipped as a solid to a gaseous diffusion plant for enrichment.
	web.ead.anl.gov /uranium/guide/uf6/index.cfm (335 words)

	Uranium Munitions Pledge of Resistance (Site not responding. Last check: 2007-11-04)
		These tiny uranium oxide particles made when up to seventy per cent of the uranium projectile you shoot burns on friction and impact will stay in the environment as long as the Earth exists, bringing death, a host of diseases, and mutation to many living creatures.
		Unlike natural uranium, which is soluble, breathed uranium oxide particles are insoluble, and become lodged in the human body if breathed, remaining there for many years, causing a host of diseases.
		Uranium oxides are mutagenic, attacking the genetic code which allows the human race to reproduce without crippling mutation.
	www.awakenedwoman.com /uranium_pledge.htm (5047 words)

	Some Chemistry of Uranium
		The uranium therefore needs to be in a gaseous form and the most convenient way of achieving this is to convert the uranium oxides to uranium hexafluoride.
		This reduced oxide is then reacted with gaseous hydrogen fluoride in another kiln to form uranium tetrafluoride, UF, though in some places this is made with aqueous HF by a wet process.
		The uranium nitrate is concentrated by evaporation and calcined to produce UO in powder form.
	www.uic.com.au /uicchem.htm (1134 words)

	Uraninite
		Uraninite is the main ore of uranium, and a source of radium and helium.
		In addition to silica and uranium oxide petrified wood, there are small crystaline deposits of both Galena and Quartz.
		The change in grain occurs as quickly as the change between Zones 1 and 2, though the change in proportion between silica and uranium oxide, and the resultant color change, is not as obvious.
	www.uraniumminerals.com /UTh/Uraninite.htm (3412 words)

	Energy Plug: Uranium Industry Annual 2001
		All six U.S. conventional uranium mills, with a combined milling capacity of 13,600 tons of ore per day, were inactive at the end of 2001.
		Reserves are estimates of the quantity of uranium in known mineral deposits that can be recovered at or below a specified "forward cost"--the operating and capital costs that will be incurred in the future to produce the uranium.
		Inventories were held as uranium oxide, natural uranium hexafluoride (UF) and enriched uranium hexafluoride, with 24 percent, 19 percent, and 57 percent, respectively.
	www.eia.doe.gov /emeu/plugs/pluran02.html (527 words)

	(DV) Nichols: My Country is Using Poison Gas in Iraq
		The uranium components turn into uranium oxide gas after the high velocity bullet or shell penetrates anything solid and explodes, as much as 80% of it ignites, burns, and aerosolizes into tiny, tiny radioactive pieces and floats in the air as a gas, blown about by the wind.
		Once the uranium metal is worked into the business end of a bullet, tank shell, bomb, or missile the uranium oxide gas is "weaponized," and ready to go.
		The uranium impurity used in bombs and reactor cores is about.711 percent of one percent of natural uranium, a tiny amount.
	www.dissidentvoice.org /Aug04/Nichols0807.htm (1949 words)

	www.mineweb.net \| energy Sorting the uranium winners (Site not responding. Last check: 2007-11-04)
		After years of squatting in the doldrums, uranium oxide, destined for eventual use in nuclear power reactors, has taken off on the back of the crude oil crisis.
		Alongside the established producers, there are many potential emerging uranium oxide producers, and some potential deposits that the market has hardly heard of, such as those in the Democratic Republic of the Congo.
		The country maintains a “three only” mine policy in respect of uranium operations, but this is widely expected to be relaxed during 2007, in order to satisfy growing demand for uranium oxide from China and India.
	www.mineweb.net /energy/798143.htm (913 words)

	URANINITE (Uranium Oxide)
		Uses: a major ore of uranium and radium, a source of helium and as a mineral specimen
		It is the chief ore of uranium and radium, which is found in trace amounts.
		Associated Minerals include cassiterite, pyrite, native silver, autunite, uranophane, uranocircite, torbernite, meta-torbernite and other uranium minerals.
	mineral.galleries.com /minerals/oxides/uraninit/uraninit.htm (333 words)

	Australia's uranium and who buys it
		Uranium ores as such were mined and treated in Australia from the 1950s until 1971.
		The Commonwealth Government announced in 1977 that new uranium mining was to proceed, commencing with the Ranger project in the Northern Territory.
		As a result, uranium was discovered at Rum Jungle in 1949, and in the South Alligator River region (1953) of the Northern Territory, then at Mary Kathleen (1954) and Westmoreland (1956) in north west Queensland.
	www.uic.com.au /nip01.htm (2037 words)

	World Nuclear Association \| Education \| Some Chemistry of Uranium (Site not responding. Last check: 2007-11-04)
		The resulting solution of uranium nitrate UO is fed into a countercurrent solvent extraction process, using tributyl phosphate dissolved in kerosene or dodecane.
		The uranium is collected by the organic extractant, from which it can be washed out by dilute nitric acid solution and then concentrated by evaporation.
		The first stage separates the uranium and plutonium in the aqueous nitric acid stream from the fission products by a countercurrent solvent extraction process, using tributyl phosphate dissolved in kerosene or dodecane.
	www.world-nuclear.org /education/chem.htm (1126 words)

	Uranium Participation Corporation :: Disclosure Plus ::
		Uranium Participation Corporation is an investment holding company which invests substantially all of its assets in uranium, either in the form of uranium oxide in concentrates ("U
		Uranium Participation Corporation’s securities are listed and trade on the Toronto Stock Exchange. Its common shares trade under the symbol U. It has two series of warrants listed on the TSX: U.WT (exercise price $6.25; expiry May 10, 2007) and U.TW.A (exercise price $12; expiry September 14, 2008).
		The weekly uranium spot price is posted weekly by The Ux Consulting Company, LLC. To obtain the posted spot price, visit www.uxc.com.
	www.uraniumparticipation.com (159 words)

	Depleted Uranium Weaponry
		Yes, I know that exposure to uranium oxide particles, which are left floating in the air by the discharge of dpeleted uranium weaponry, are deemed "acceptable" by the US government.
		In one of the files I uploaded for you, the one from the Netherlands, I think, scientists say there is no way yet to tell what effect such uranium oxide particles have when breathed in internally.
		This makes clear the possible, perhaps even probable dangers in the uranium oxide particles that are freed in the atmosphere when depleted uranium weapons are used.
	oldweb.uwp.edu /academic/criminal.justice/depuranium01.htm (1020 words)

	American Elements: Uranium Oxide Supplier & Tech Info
		Rare Earth oxide compounds are basic anhydrides and can therefore react with acids and with strong reducing agents in redox reactions.
		Uranium Oxide is also available in pellets, pieces, sputtering targets, tablets, and nanopowder (from American Elements' nanoscale production facilities).
		Uranium Oxide is generally immediately available in most volumes.
	www.americanelements.com /uox.html (131 words)

	Viking Phoenix Web Page: Japan's Atomic Bomb (Nazi sub carried uranium) (Site not responding. Last check: 2007-11-04)
		Zimmerman said that amount of uranium oxide would have contained about 3.5 kilograms of the isotope U-235, which is the critical one for making bombs.
		In theory the uranium might have helped fuel the uranium bomb that leveled Hiroshima or the plutonium bomb that was dropped on Nagasaki.
		In a kind of modern alchemy, plutonium is made by irradiating uranium in a nuclear reactor, turning it from one elemen t into another.
	vikingphoenix.com /public/JapanIncorporated/1895-1945/nzisub4j.htm (1328 words)

	Domestic Uranium Production Report
		The U.S. uranium production industry's turnaround continues for a second year through 2005 for drilling, mining, concentrate production, employment and expenditures.
		Shipments of uranium concentrate from domestic production mills and in-situ leach facilities were also estimated at 2.7 million pounds in 2005.
		Estimated employment in the U.S. uranium production industry was 638 person-years, an increase of 52 percent from the 2004 total.
	www.eia.doe.gov /cneaf/nuclear/dupr/dupr.html (225 words)

	Uranium (Site not responding. Last check: 2007-11-04)
		Uranium oxide has been used since Roman times for yellow pigments in glass.
		The element was discovered in 1789 by a German chemist, Martin Klaproth, who named it for the newly observed seventh planet.
		Although only mildly radioactive, uranium compounds are toxic.
	chemlab.pc.maricopa.edu /periodic/U.html (98 words)

	Chemistry : Periodic Table : uranium : compound data [uranium (IV) oxide]
		Chemistry : Periodic Table : uranium : compound data [uranium (IV) oxide]
		Chemistry: WebElements Periodic Table: Professional Edition: Uranium: compound data [uranium (IV) oxide]
		For each compound, and where possible, a formal oxidation number for each element is given, but the usefulness of this number is limited, especially so for p-block elements in particular.
	www.webelements.com /webelements/compounds/text/U/O2U1-1344576.html (342 words)

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