Carnotite

Chmical formula: K₂(UO₂)₂(VO₄)₂·3H₂OMohs scale hardness: 2

Specific gravity: (3-5) 4,7 g/cm³

^{In the United States it is an important ore of uranium in the Colorado Plateau:}^{Wyoming, Colorado, Arizona, Utah, New Mexico, Pennsylvania.}

^{Carnotite is reported in Congo, Morocco, Australia, Kazakhstan, Pakistan, Siberia}

References