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Ursilite Mineral Data
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General Ursilite Information
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 Chemical Formula: |
(Mg,Ca)4[(UO2)4(OH)5/(Si2O5)5.5]•13(H2O) |
| Composition: |
Molecular Weight = 2,261.26 gm |
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Calcium 1.77 % Ca 2.48 % CaO |
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Magnesium 3.22 % Mg 5.35 % MgO |
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Uranium 42.11 % U 47.77 % UO2 |
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Silicon 13.66 % Si 29.23 % SiO2 |
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Hydrogen 1.38 % H 12.35 % H2O |
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Oxygen 37.85 % O |
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______ ______ |
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100.00 % 97.17 % = TOTAL OXIDE |
| Empirical Formula: |
Mg3Ca(UO2)4(OH)5(Si2O5)5.5•13(H2O) |
| Environment: |
Oxidized zone oI a uranium-coal deposit in fractures in the coal 20-50 m. below the surface. Both Ca and Mg dominant forms are present. |
| IMA Status: |
Not Approved IMA - Published 1957 |
| Locality: |
Not Stated. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the composition (U, Si). |
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