Uranocircite-II
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 and is a green to yellow colour. It has a Mohs hardness of about 2. The "circ" in the name uranocircite is from the ancient Greek word for "falcon", because it was discovered in Falkenstein, Germany. Uranocircite contains about 45% uranium, and is mainly mined in Bergen in Saxony, Germany.
Intro adapted from Wikipedia (CC BY-SA).
Uranocircite-II is an IMA-recognized mineral species in the phosphate class, with the chemical formula Ba(UO₂)₂(PO₄)₂·10H₂O.
It crystallizes in the monoclinic crystal system (space group P4/nmm).
IMA symbol Urc-II, grandfathered status — known before the IMA’s founding, named in 1877.