Tyuyamunite

Tyuyamunite (pronounced tuh-YOO-ya-moon-ite) is a very rare uranium mineral with formula Ca(UO2)2V2O8·(5-8)H2O. It is a member of the carnotite group. It is a bright, canary-yellow color because of its high uranium content. Also, because of tyuyamunite`s high uranium content, it is radioactive. It was named by Konstantin Avtonomovich Nenadkevich....
Found on http://en.wikipedia.org/wiki/Tyuyamunite

tyuyamunite

radioactive, yellow, soft, and waxy uranium and vanadium oxide mineral, Ca(UO2)2(VO4)25–8H2O. It is considered to be the calcium analogue of ...
Found on http://www.britannica.com/eb/a-z/t/100
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