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Name: |
autunite |
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Class: |
Phosphates/Arsenates/Vanadates |
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Chemistry: |
Ca(UO2)2(PO4)2 € 10-12 H2O |
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Color(s): |
lemon-sulfur yellow, yellow-green, green |
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Hardness: |
2-2.5 |
SpecGrav: |
3.1-3.2 |
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Fracture: |
Cleavage: |
perfect, one direction |
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Crystal: |
tetragonal; usually tabular xtls. often micaceous |
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Envronment: |
secondary uranium mineral, pegmatites and hypothermal veins. |
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Association: |
torbernite, uranocicrcite, flourite, barite, quartz |
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Locals: |
Germany / Eng;amd / France / Zaire, Africa / Grafton, Colorado, NH, NC, SD, USA / |
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Misc: |
The name is derived from a locally ... Autun, Saone-et-Loire, France. |
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Photos |
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1.) Malacacheta, Minas Gerais, Brazil |
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