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Macaulayite Mineral Data
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General Macaulayite Information
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 Chemical Formula: |
(Fe+++,Al)24Si4O43(OH)2 |
| Composition: |
Molecular Weight = 2,116.93 gm |
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Aluminum 2.55 % Al 4.82 % Al2O3 |
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Iron 58.04 % Fe 82.98 % Fe2O3 |
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Silicon 5.31 % Si 11.35 % SiO2 |
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Hydrogen 0.10 % H 0.85 % H2O |
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Oxygen 34.01 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Fe3+22Al2Si4O43(OH)2 |
| Environment: |
Deeply weathered granite. |
| IMA Status: |
Approved IMA 1984 |
| Locality: |
Bennachie car park, 7 km NW of Inverurie, Aberdeenshire, Scotland. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the Macaulay Institute for Soil Research. |
| Name Pronunciation: |
Macaulayite + Pronunciation  |
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