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Dorrite Mineral Data
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General Dorrite Information
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 Chemical Formula: |
Ca2Mg2Fe+++4(Al,Fe+++)4Si2O20 |
| Composition: |
Molecular Weight = 893.97 gm |
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Calcium 8.97 % Ca 12.55 % CaO |
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Magnesium 5.44 % Mg 9.02 % MgO |
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Aluminum 6.04 % Al 11.41 % Al2O3 |
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Iron 37.48 % Fe 53.59 % Fe2O3 |
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Silicon 6.28 % Si 13.44 % SiO2 |
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Oxygen 35.79 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca2Mg2Fe3+6Al2Si2O20 |
| Environment: |
Occurs in a paralava (pyrometamorhic melt rock) formed from burning coal beds. |
| IMA Status: |
Approved IMA 1988 |
| Locality: |
Druham ranch, 25 km S of Gillette in the Powder River Basin, Wyoming. USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for John A. Dorr (1922-1986), University of Michigan. |
| Name Pronunciation: |
Dorrite  |
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