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Rectorite Mineral Data
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General Rectorite Information
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 Chemical Formula: |
(Na,Ca)Al4(Si,Al)8O20(OH)4•2(H2O) |
| Composition: |
Molecular Weight = 784.18 gm |
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Potassium 0.50 % K 0.60 % K2O |
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Sodium 1.76 % Na 2.37 % Na2O |
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Calcium 1.53 % Ca 2.15 % CaO |
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Aluminum 20.64 % Al 39.01 % Al2O3 |
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Silicon 21.49 % Si 45.97 % SiO2 |
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Hydrogen 1.03 % H 9.19 % H2O |
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Oxygen 53.05 % O |
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______ ______ |
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100.00 % 99.29 % = TOTAL OXIDE |
| Empirical Formula: |
Na0.6Ca0.3K0.1Al6Si6O20(OH)4•2(H2O) |
| Environment: |
Alteration of potassic feldspars or diagenesis of muscovite. |
| IMA Status: |
Valid Species (Pre-IMA) 1891 |
| Locality: |
Blue Mountain district, Marble, Garland County, Arkansas, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for E. W. Rector (1849-1917), legislator and lawyer of Hot Springs, Arkansas, USA. |
| Name Pronunciation: |
Rectorite + Pronunciation  |
| Synonym: |
Ca-Rectorite |
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K-Rectorite |
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Na-Rectorite |
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Smectite |
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Tarasovite |
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