| Uranocircite | |
| Category: | Phosphate mineral |
| Formula: | Ba(UO2)2(PO4)2·10H2O |
| Imasymbol: | Urc-II[1] |
| Strunz: | 8.EB.05 |
| System: | Tetragonal |
| Class: | Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m) |
| Symmetry: | I4/mmm |
| Unit Cell: | a = 7.01, c = 20.46 [Å]; Z = 2 |
| Other: | Radioactive |
| References: | [2] [3] |
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.