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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.
Quick Facts General, Category ...
Uranocircite | |
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![]() Uranocircite | |
General | |
Category | Phosphate mineral |
Formula (repeating unit) | 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 | ![]() |
References | [2][3] |
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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.