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Gobbinsite Mineral Data
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General Gobbinsite Information
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 Chemical Formula: |
(Na2,Ca)2K2Al6Si10O32•12(H2O) |
| Composition: |
Molecular Weight = 1,339.93 gm |
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Potassium 6.13 % K 7.38 % K2O |
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Sodium 4.29 % Na 5.78 % Na2O |
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Calcium 1.79 % Ca 2.51 % CaO |
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Aluminum 12.48 % Al 23.59 % Al2O3 |
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Silicon 20.96 % Si 44.84 % SiO2 |
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Hydrogen 1.81 % H 16.13 % H2O |
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Oxygen 52.54 % O |
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______ ______ |
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100.00 % 100.24 % = TOTAL OXIDE |
| Empirical Formula: |
Na2.5Ca0.6K2.1Al6.2Si10O32•12(H2O) |
| Environment: |
Formed from sodium rich fluids, in basalts and related igneous rocks. |
| IMA Status: |
Approved IMA 1982 |
| Locality: |
Basalt cliffs near Hills Port, south of the Gobbins area, County Antrim, Northern Ireland. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Gobbinsite + Pronunciation  |
| Synonym: |
ICSD 30975 |
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PDF 35-559 |
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