Uranium can take many chemical forms. In nature, uranium is generally found as an oxide, such as in the olive-green-colored mineral pitchblende. Uranium oxide is also the chemical form most often used for nuclear fuel. Uranium-fluorine compounds are also common in uranium processing, with uranium hexafluoride (UF6) and uranium tetrafluoride (UF4) being the two most common. In its pure form, uranium is a silver-colored metal.
Uranium Oxides - U3O8 and UO2
The most common forms of uranium oxide are U3O8 and UO2. Both oxide forms are solids that have low solubility in water and are relatively stable over a wide range of environmental conditions. Triuranium octaoxide (U3O8) is the most stable form of uranium and is the form most commonly found in nature. Uranium dioxide (UO2) is the form in which uranium is most commonly used as a nuclear reactor fuel. At ambient temperatures, UO2 will gradually convert to U3O8. Because of their stability, uranium oxides are generally considered the preferred chemical form for storage or disposal.
Uranium Hexafluoride (UF6)
Uranium hexafluoride (UF6) is the chemical form of uranium that is used during the uranium enrichment process. Within a reasonable range of temperature and pressure, it can be a solid, liquid, or gas. Solid UF6 is a white, dense, crystalline material that resembles rock salt. Uranium hexafluoride does not react with oxygen, nitrogen, carbon dioxide, or dry air, but it does react with water or water vapor (including humidity in the air). When UF6 comes into contact with water, such as water vapor in the air, the UF6 and water react, forming corrosive hydrogen fluoride (HF) and a uranium-fluoride compound called uranyl fluoride (UO2F2). For this reason, UF6 is always handled in leak-tight containers and processing equipment. Although very convenient for processing, UF6 is not considered a preferred form for long-term storage or disposal because of its relative instability.
Uranium Tetrafluoride (UF4)
Uranium tetrafluoride (UF4) is often called green-salt because of its characteristic color. It is generally an intermediate in the conversion of UF6 to either uranium oxide (U3O8 or UO2) or uranium metal, because it can be readily converted to any of these forms. UF4 is a solid composed of agglomerating particles with a texture similar to baking soda. It is non-volatile, non-hydroscopic, but only slightly soluble in water. After exposure to water, UF4 slowly dissolves and undergoes hydrolysis, forming several possible uranium compounds and hydrogen fluoride (HF). The time for hydrolysis can be significant. Although not as stable as the uranium oxides, several recent studies have indicated that UF4 may be suitable for disposal.
Uranium metal is heavy, silvery white, malleable, ductile, and softer than steel. It is one of the densest materials known (19 g/cm3), being 1.6 times more dense than lead. Uranium metal is not as stable as U3O8 or UO2 because it is subject to surface oxidation. It tarnishes in air, with the oxide film preventing further oxidation of massive metal at room temperature. Water attacks uranium metal slowly at room temperature and rapidly at higher temperatures. Uranium metal powder or chips will ignite spontaneously in air at ambient temperature.How to do tricks in your trampoline? How do card tricks trick the brain? How to claim exempt on w4 2021? What side does the bride stand on? What is the meaning of defamation? What does hook up mean? Tricks to see what the price is to buy from redbox? How to do special tricks on thug pro? What are the 7 wonders? How to do 11 flip tricks without crashing? How long to cook turkey burgers? What are the qualifications for medicaid? How to read blood pressure? What is tips procedure liver? How to set up a voicemail? How to make dumplings from scratch? when you ask your son for computer helper How long does grass seed take to grow? How can earlier tips becoming morning? What is the 444 meaning? How long to get passport? What is gerrymandering mean? What teams are playing monday night football tonight? What does the name dominic mean? What does firmament mean? what is the thickening agent in hamburger helper What does hcl stand for? How to order? Maury dis chicken head's tricks what you got? What does 1221 mean? Why don't you be you and i'll be me meaning? What genes are inherited from father only? How to tie a ribbon? How long does it take water to boil? How to get rid of keratosis pilaris? What is the meaning of mars by yungblud? How to change reddit username? What does it mean if someone dies in your dream? How to get an ingrown hair out? Fast math tricks - how to multiply 2 digit numbers up to 100 - the fast way!? How to fix a leaky faucet? What does it mean when you have deja vu? How much to beef tips cost at safeway in alaska? How to increase testosterone? What are silverfish? How to lower blood sugar quickly emergency? How to watch the oscars 2022? Why did ahmanet have metal tips on her fingers and toes? What does gop mean? What sugar is found in dna? How to force shut down mac? where do download helper downloads go What age does puberty end? What does it mean to manifest? how to add html helper You know what i mean meaning? What does puta mean in english? How to clean tennis shoes? How to clear chrome cache? What is umami? How to watch the super bowl for free? What does riz mean? What time does it get dark now? How to grow a beard if you can't? What does psyche mean? I have found what you are like meaning? How to do tricks with your revolver rdr2? What is the meaning of theophany? How to use bag of tricks mod in pathfinder kingmaker? What russian word meaning openness begins with the letter g? How to get a divorce in california? What is the real meaning of father's day? which statement is believed to be true concerning helper t 2 (th2) cells Tips on how to buy a sheriff sale home in johnston county nc? What does palpable mean? What channel is tbs on directv? How to do string tricks? What is the meaning of the australian flag? What does survey mean? What does width d mean in shoes? what is windows live id sign-in helper How to unlock a master lock? Government is best which governs least meaning? How to hard reset airpods? What does d mean in one piece? What does charlie charlie look like? What is the scariest movie in the world? How to increase sperm volume? how to turn helper options on and off in csgo Episode of kitchen nightmares where owner keeps tips arizona? Tips how to organize a lot of makeup? How to cancel apple tv? how to stop itunes helper mac How to get detergent stains out of clothes? Which is the nearest meaning of the word paraphrase? what temp & how long to cook hamburger helper in oven? What does cfm mean? Where to view the tips and tricks on coaching actuaries? how much is marriage helper 911
Rare earth uranium oxide, high grade unrefined uranium ore uraninite, for Geiger counter & radiation detector test source!
The rare earth uranium oxide, naturally radioactive euxenite-(Y) in granitic pegmatite, for Geiger counter & radiation detector test source!