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Macdonaldite Mineral Data
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General Macdonaldite Information
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 Chemical Formula: |
BaCa4[Si16O36(OH)2]•10(H2O) |
| Composition: |
Molecular Weight = 1,537.15 gm |
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Barium 8.93 % Ba 9.97 % BaO |
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Calcium 10.43 % Ca 14.59 % CaO |
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Silicon 29.23 % Si 62.54 % SiO2 |
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Hydrogen 1.44 % H 12.89 % H2O |
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Oxygen 49.96 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
BaCa4Si16O36(OH)2•10(H2O) |
| Environment: |
Sanbornite-bearing metamorphic rocks near a granodiorite contact. |
| IMA Status: |
Approved IMA 1965 |
| Locality: |
Big Creek - Rush Creek sanbornite deposit, 5 miles NE of Trimmer, Fresno Co., California. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Grodon Andrew Macdonald (1911-1978), American volcanologist, University of Hawaii. |
| Name Pronunciation: |
Macdonaldite + Pronunciation  |
| Synonym: |
ICSD 23566 |
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PDF 18-163 |
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