General Pigeonite Information
|
 Chemical Formula: |
(Mg,Fe++,Ca)(Mg,Fe++)Si2O6 |
| Composition: |
Molecular Weight = 219.70 gm |
| |
Calcium 1.82 % Ca 2.55 % CaO |
| |
Magnesium 14.93 % Mg 24.77 % MgO |
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Iron 13.98 % Fe 17.99 % FeO |
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Silicon 25.57 % Si 54.70 % SiO2 |
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Oxygen 43.69 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mg1.35Fe2+0.55Ca0.1Si2O6 |
| Environment: |
Common in rapidly cooled siliceous volcanic rocks. Inverted varieties with exsolved augite are found in layered mafic intrusives. From metamorphosed iron formations. |
| IMA Status: |
Valid Species (Pre-IMA) 1900 |
| Locality: |
Pigeon Point, Cook Co., Minnesota Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Pigeonite + Pronunciation  |
| Synonym: |
ICSD 15197 |
| |
PDF 13-421 |
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