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Lawsonite Mineral Data
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General Lawsonite Information
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 Chemical Formula: |
CaAl2Si2O7(OH)2•(H2O) |
| Composition: |
Molecular Weight = 314.24 gm |
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Calcium 12.75 % Ca 17.85 % CaO |
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Aluminum 17.17 % Al 32.45 % Al2O3 |
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Silicon 17.88 % Si 38.24 % SiO2 |
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Hydrogen 1.28 % H 11.47 % H2O |
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Oxygen 50.91 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
CaAl2Si2O7(OH)2•(H2O) |
| Environment: |
Originally described from a crystalline schist associated with serpentine. Also found as a secondary mineral in altered gabbros and diorites. |
| IMA Status: |
Valid Species (Pre-IMA) 1895 |
| Locality: |
Reed Station, Tiburon peninsula, Marin County, California, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Andrew Cowper Lawson (1861-1952), Scottish-American geologist. |
| Name Pronunciation: |
Lawsonite + Pronunciation  |
| Synonym: |
ICSD 80835 |
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PDF 13-533 |
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