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Mountainite Mineral Data
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General Mountainite Information
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 Chemical Formula: |
(Ca,Na2,K2)2Si4O10•3(H2O) |
| Composition: |
Molecular Weight = 409.00 gm |
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Potassium 4.78 % K 5.76 % K2O |
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Sodium 5.62 % Na 7.58 % Na2O |
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Calcium 9.80 % Ca 13.71 % CaO |
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Silicon 27.47 % Si 58.76 % SiO2 |
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Hydrogen 1.48 % H 13.21 % H2O |
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Oxygen 50.85 % O |
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______ ______ |
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100.00 % 99.02 % = TOTAL OXIDE |
| Empirical Formula: |
NaCaK0.5Si4O10•3(H2O) |
| Environment: |
Intrusive kimberlite and differentiated alkalic massif (Lovozero, Russia). |
| IMA Status: |
Valid Species (Pre-IMA) 1957 |
| Locality: |
In a kimberlite pipe at Kimberley, South Africa. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Edgar Donald Mountain, Professor of Geology, Rhodes University, Grahamstown, South Africa. |
| Name Pronunciation: |
Mountainite + Pronunciation  |
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