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Chiavennite Mineral Data
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General Chiavennite Information
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 Chemical Formula: |
CaMnBe2Si5O13(OH)2•2(H2O) |
| Composition: |
Molecular Weight = 531.51 gm |
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Calcium 7.54 % Ca 10.55 % CaO |
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Manganese 10.34 % Mn 13.35 % MnO |
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Beryllium 3.39 % Be 9.41 % BeO |
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Silicon 26.42 % Si 56.52 % SiO2 |
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Hydrogen 1.14 % H 10.17 % H2O |
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Oxygen 51.17 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
CaMn2+Be2Si5O13(OH)2•2(H2O) |
| Environment: |
Coating beryl in late-stage pegmatites (Tanno, Italy); in vugs in syenite pegmatites (Norway). |
| IMA Status: |
Approved IMA 1983 |
| Locality: |
From Tanno, Chiavenna, Lombardy, Italy. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
ICSD 80917 |
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PDF 35-602 |
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