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Coesite Mineral Data
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General Coesite Information
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 Chemical Formula: |
SiO2 |
| Composition: |
Molecular Weight = 60.08 gm |
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Silicon 46.74 % Si 100.00 % SiO2 |
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Oxygen 53.26 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
(SiO2) |
| Environment: |
High temperature and high pressure polymorph of quartz (500-800 deg C, ~ 30-35 kbar). Formed in impact craters and ultra-high-pressure eclogite rocks. |
| IMA Status: |
Valid Species (Pre-IMA) 1954 |
| Locality: |
Metor Crater, Cononino County, Arizona, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Loring Coes, Jr. (1915-1973), American chemist, Norton Company, who first synthesized the phase. |
| Synonym: |
ICSD 18112 |
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PDF 14-654 |
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