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Sanidine Mineral Data
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General Sanidine Information
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 Chemical Formula: |
(K,Na)(Si,Al)4O8 |
| Composition: |
Molecular Weight = 274.30 gm |
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Potassium 10.69 % K 12.88 % K2O |
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Sodium 2.10 % Na 2.82 % Na2O |
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Aluminum 9.84 % Al 18.59 % Al2O3 |
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Silicon 30.72 % Si 65.71 % SiO2 |
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Oxygen 46.66 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
K0.75Na0.25AlSi3O8 |
| Environment: |
Acid volcanic rocks. |
| IMA Status: |
Valid Species (Pre-IMA) 1808 |
| Locality: |
Common world wide occurrences. Link to MinDat.org Location Data. |
| Name Origin: |
From the Greek sanis - "little plate" and idos - "to see." |
| Name Pronunciation: |
Sanidine  |
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