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Rilandite Mineral Data
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General Rilandite Information
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 Chemical Formula: |
(Cr,Al)6SiO11•5(H2O) (?) |
| Composition: |
Molecular Weight = 568.61 gm |
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Aluminum 7.12 % Al 13.45 % Al2O3 |
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Chromium 41.15 % Cr 60.14 % Cr2O3 |
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Silicon 4.94 % Si 10.57 % SiO2 |
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Hydrogen 1.77 % H 15.84 % H2O |
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Oxygen 45.02 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Cr4.5Al1.5SiO11•5(H2O) |
| Environment: |
Sandstone-hosted uranium-vanadium deposits. Needs further study. |
| IMA Status: |
Valid Species (Pre-IMA) 1933 |
| Locality: |
Carnotite claims 20 km ENE fo Meeker, Colorado, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for James L. Riland (1857-1938?), newspaper publisher of Meeker, Colorado, on whose claim the mineral was found. |
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