Uranocircite or Uranocircite-II is a uranium mineral with the chemical formula: Ba(UO₂)₂(PO₄)₂·10H₂O. Uranocircite-I was discredited (the IMA-CMNMC published 'The New IMA List of Minerals', September 2012). It is a phosphate mineral which contains

barium Barium is a chemical element with the symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element. Th ...

and is a green to yellow colour. It has a Mohs hardness of about 2. Uranocircite was named after the Greek for "falcon" because it was discovered in

Falkenstein Falkenstein or Falckenstein ("falcons' stone" in German) may refer to: Places Austria * Falkenstein, Lower Austria, a market town in the district of Mistelbach Germany * Falkenstein, Bavaria, a market town in the district of Cham * Falkenst ...

, Germany. Uranocircite contains about 45% uranium in it and is mainly mined in Bergen in Saxony, Germany.

References

Webmineral data
Uranium(VI) minerals Phosphate minerals Tetragonal minerals Minerals in space group 139 {{phosphate-mineral-stub