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Guimaraesite Mineral Data
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General Guimaraesite Information
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 Chemical Formula: |
Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4•6H2O |
| Composition: |
Molecular Weight = 1,107.66 gm |
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Calcium 7.24 % Ca 10.13 % CaO |
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Magnesium 3.84 % Mg 6.37 % MgO |
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Beryllium 3.25 % Be 9.03 % BeO |
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Zinc 13.28 % Zn 16.53 % ZnO |
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Iron 5.04 % Fe 6.49 % FeO |
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Phosphorus 16.78 % P 38.44 % P2O5 |
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Hydrogen 1.46 % H 13.01 % H2O |
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Oxygen 49.11 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca2Zn2.25Mg1.75Fe2+Be4(PO4)6(OH)4•6(H2O) |
| Environment: |
Roscherite group. Zinc analog of zanazziite. |
| IMA Status: |
Proposed IMA 2006 |
| Locality: |
Granite pegmatite near the Piau� river, Itinga county, Minas Gerais, Brazil Link to MinDat.org Location Data. |
| Name Origin: |
Commission on New Minerals, Nomenclature and Classification (CNMNC) |
| Synonym: |
IMA2006-028 |
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