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Pentagonite Mineral Data
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General Pentagonite Information
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 Chemical Formula: |
Ca(VO)Si4O10•4(H2O) |
| Composition: |
Molecular Weight = 451.42 gm |
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Calcium 8.88 % Ca 12.42 % CaO |
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Vanadium 11.28 % V 20.15 % V2O5 |
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Silicon 24.89 % Si 53.24 % SiO2 |
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Hydrogen 1.79 % H 15.96 % H2O |
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Oxygen 53.16 % O |
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______ ______ |
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100.00 % 101.77 % = TOTAL OXIDE |
| Empirical Formula: |
CaV5+Si4O11•4(H2O) |
| Environment: |
Alteration product occurring in basalts and tuffs. |
| IMA Status: |
Approved IMA 1973 |
| Locality: |
Lake Owyhee State Park, Malheur County, and Goble, Columbia County, Oregon, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named from the Greek, penta, "five" and angle in allusion to the fiveling twins common in this species. |
| Name Pronunciation: |
Pentagonite + Pronunciation  |
| Synonym: |
ICSD 10262 |
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PDF 25-181 |
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