Uranocircite
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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.
| Uranocircite | |
|---|---|
Uranocircite | |
| General | |
| Category | Phosphate mineral |
| Formula | Ba(UO2)2(PO4)2·10H2O |
| IMA symbol | Urc-II[1] |
| Strunz classification | 8.EB.05 |
| Crystal system | Tetragonal |
| Crystal class | Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m) |
| Space group | I4/mmm |
| Unit cell | a = 7.01, c = 20.46 [Å]; Z = 2 |
| Identification | |
| Other characteristics |  Radioactive |
| References | [2][3] |
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.
