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Boromullite Mineral Data
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General Boromullite Information
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 Chemical Formula: |
Al4.5SiB0.5O9.5 |
| Composition: |
Molecular Weight = 610.43 gm |
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Magnesium 0.04 % Mg 0.07 % MgO |
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Aluminum 39.25 % Al 74.16 % Al2O3 |
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Iron 0.27 % Fe 0.35 % FeO |
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Silicon 8.88 % Si 19.00 % SiO2 |
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Boron 2.02 % B 6.50 % B2O3 |
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Oxygen 49.54 % O |
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______ ______ |
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100.00 % 100.08 % = TOTAL OXIDE |
| Empirical Formula: |
Mg0.01Fe2+0.03Al8.88Si1.93B1.14O18.9 |
| Environment: |
Formed during anatexis of B-rich pelitic rocks under granulite facies conditions. Structurally related to mullite. |
| IMA Status: |
Approved IMA 2007 (Dana # Added) |
| Locality: |
Mount Stafford, Northern Territory, Australia Link to MinDat.org Location Data. |
| Name Origin: |
Named as the boron analog to mullite. |
| Synonym: |
IMA2007-021 |
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