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Holtite Mineral Data
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General Holtite Information
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 Chemical Formula: |
Al6(Al,Ta)(BO3)[(SiO4,SbO4,AsO4)]3(O,OH)3 |
| Composition: |
Molecular Weight = 2,589.58 gm |
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Tantalum 10.48 % Ta 12.80 % Ta2O5 |
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Aluminum 24.17 % Al 45.67 % Al2O3 |
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Iron 0.22 % Fe 0.28 % FeO |
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Silicon 11.50 % Si 24.59 % SiO2 |
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Boron 1.59 % B 5.11 % B2O3 |
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Antimony 5.64 % Sb 7.50 % Sb2O5 |
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Arsenic 2.03 % As 3.11 % As2O5 |
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Hydrogen 0.08 % H 0.73 % H2O |
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Oxygen 44.30 % O |
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______ ______ |
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100.00 % 99.78 % = TOTAL OXIDE |
| Empirical Formula: |
Al23.2Ta1.5Fe2+0.1B3.8Si10.6Sb1.2As0.7O69.6(OH)2.1 |
| Environment: |
As coatings on stibiotantalite and replacing tantalite in a pegmatite. |
| IMA Status: |
Approved IMA 1971 |
| Locality: |
At Bunbury Gully, Greenbushes, Western Australia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Harold Edward Holt (1908-1967), Prime minister of Australia (1966-1967). |
| Name Pronunciation: |
Holtite  |
| Synonym: |
ICSD 66143 |
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PDF 25-1209 |
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