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Cryptohalite Mineral Data
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General Cryptohalite Information
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 Chemical Formula: |
(NH4)2SiF6 |
| Composition: |
Molecular Weight = 178.15 gm |
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Silicon 15.76 % Si 33.73 % SiO2 |
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Hydrogen 4.53 % H - % Calc as (NH4)2O |
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Nitrogen 15.72 % N 29.23 % (NH4)2O |
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Fluorine 63.98 % F 63.98 % F |
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- %
F -26.94 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
(NH4)2SiF6 |
| Environment: |
Volcanic sublimate. Dimorphous with bararite, the lower-temperature form. |
| IMA Status: |
Valid Species (Pre-IMA) 1873 |
| Locality: |
Vesuvius, Campania, Italy. Link to MinDat.org Location Data. |
| Name Origin: |
Named from the Greek for concealed and salt, for being admixed with sal ammoniac. |
| Synonym: |
ICSD 18033 |
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PDF 44-1484 |
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