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Tilleyite Mineral Data
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General Tilleyite Information
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 Chemical Formula: |
Ca5Si2O7(CO3)2 |
| Composition: |
Molecular Weight = 488.58 gm |
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Calcium 41.02 % Ca 57.39 % CaO |
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Silicon 11.50 % Si 24.60 % SiO2 |
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Carbon 4.92 % C 18.02 % CO2 |
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Oxygen 42.57 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca5Si2O7(CO3)2 |
| Environment: |
In the contact metamorphic zone between igneous rocks and limestones, formed at low pressure and high temperature. |
| IMA Status: |
Valid Species (Pre-IMA) 1933 |
| Locality: |
Crestmore quarry, 5 miles NW of Riverside, Riverside County, California. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Cecil Edgar Tilley (1894-1973), British petrologist, Cambridge University, Cambridge, England. |
| Name Pronunciation: |
Tilleyite + Pronunciation  |
| Synonym: |
ICSD 14256 |
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PDF 24-184 |
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