What is "tyuyamunite"

n. (context mineralogy English) A very rare uranium mineral, Ca(UO₂)₂V₂O₈·(5-8)H₂O.

Tyuyamunite (pronounced tuh-YOO-ya-moon-ite) is a very rare uranium mineral with formula Ca(UO)VO·(5-8)HO. 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, in 1912, after its discovery locality, Tyuya-Muyun, Fergana Valley, Kyrgyzstan.