Carnotite

Name:
Carnotite
Detailed information:

M Formula:	K2(UO2)2(VO4)2•3H2O
Properties:
Bright lemon-yellow, dull or earthy luster (pearly or silky when coarsely crystalline). Soluble in acids. Radioactive. Usually occurs as a powder or in fine-grained aggregates.
Occurrence:
Colorado, Utah, Arizona, New Mexico, South Dakota, Australia, Zaire, the former U.S.S.R..
Hazard:
A radioactive poison.
Use:
Ore of uranium, source of radium.