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Aegirine-augite Mineral Data
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General Aegirine-augite Information
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 Chemical Formula: |
(Ca,Na)(Mg,Fe++,Fe+++)[Si2O6] |
| Composition: |
Molecular Weight = 228.05 gm |
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Sodium 2.52 % Na 3.40 % Na2O |
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Calcium 13.18 % Ca 18.44 % CaO |
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Magnesium 5.33 % Mg 8.84 % MgO |
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Iron 12.24 % Fe 7.88 % FeO / 8.75 % Fe2O3 |
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Silicon 24.63 % Si 52.69 % SiO2 |
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Oxygen 42.09 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca0.75Na0.25Mg0.5Fe2+0.25Fe3+0.25(Si2O6) |
| Environment: |
Characteristic mineral of alkaline rocks, particularly syenites and iron-rich metamorphic and metasomatic rocks. |
| IMA Status: |
Not Approved IMA 1950 |
| Locality: |
Common world-wide. Link to MinDat.org Location Data. |
| Name Origin: |
Name derived from its intermediate pyroxene composition. This is not an end-member species. |
| Name Pronunciation: |
Aegirine-augite  |
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