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Synadelphite Mineral Data
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General Synadelphite Information
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 Chemical Formula: |
(Mn,Mg,Ca,Pb)9(As+++O3)(As+++++O4)2(OH)9•2(H2O) (?) |
| Composition: |
Molecular Weight = 1,089.48 gm |
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Calcium 0.37 % Ca 0.51 % CaO |
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Magnesium 0.22 % Mg 0.37 % MgO |
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Manganese 43.37 % Mn 56.00 % MnO |
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Arsenic 20.63 % As 9.08 % As2O3 / 21.10 % As2O5 |
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Hydrogen 1.20 % H 10.75 % H2O |
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Lead 1.90 % Pb 2.05 % PbO |
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Oxygen 32.31 % O |
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______ ______ |
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100.00 % 99.85 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+8.6Mg0.1Ca0.1Pb0.1(AsO3)(AsO4)2(OH)9�2(H2O) |
| Environment: |
Low-temperature hydrothermal mineral cutting hausmannite ores in dolomitic marble. |
| IMA Status: |
Valid Species (Pre-IMA) 1884 |
| Locality: |
Moss mine, Nordmark and at Langban, Varmland, Sweden. Link to MinDat.org Location Data. |
| Name Origin: |
From the Greek for "with" and "brother," as it is commonly associated with several other chemically similar minerals. |
| Name Pronunciation: |
Synadelphite + Pronunciation  |
| Synonym: |
ICSD 15184 |
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PDF 24-725 |
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