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Microsommite Mineral Data
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General Microsommite Information
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 Chemical Formula: |
(Na,Ca,K)7-8(Si,Al)12O24(Cl,SO4)2-3 |
| Composition: |
Molecular Weight = 1,086.58 gm |
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Potassium 3.24 % K 3.90 % K2O |
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Sodium 8.89 % Na 11.98 % Na2O |
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Calcium 9.96 % Ca 13.93 % CaO |
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Aluminum 16.14 % Al 30.50 % Al2O3 |
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Silicon 14.22 % Si 30.41 % SiO2 |
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Sulfur 2.07 % S 5.16 % SO3 |
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Chlorine 7.50 % Cl 7.50 % Cl |
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- %
Cl -1.69 % -O=Cl2 |
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Oxygen 37.99 % O |
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______ ______ |
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100.00 % 101.69 % = TOTAL OXIDE |
| Empirical Formula: |
Na4.2Ca2.7K0.9Al6.5Si5.5O23Cl2.3(SO4)0.7 |
| Environment: |
In ejected volcanic masses and in leucitites. |
| IMA Status: |
Valid Species (Pre-IMA) 1872 |
| Locality: |
Mte Somma, Vesuvius, Italy. Link to MinDat.org Location Data. |
| Name Origin: |
Named after its locality. |
| Name Pronunciation: |
Microsommite + Pronunciation  |
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