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Francisite Mineral Data
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General Francisite Information
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 Chemical Formula: |
Cu3Bi(SeO3)2O2Cl |
| Composition: |
Molecular Weight = 720.99 gm |
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Copper 26.44 % Cu 29.77 % Cu2O |
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Bismuth 28.99 % Bi 32.31 % Bi2O3 |
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Selenium 21.90 % Se 30.78 % SeO2 |
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Chlorine 4.92 % Cl 4.92 % Cl |
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- %
Cl -1.11 % -O=Cl2 |
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Oxygen 17.75 % O |
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______ ______ |
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100.00 % 96.67 % = TOTAL OXIDE |
| Empirical Formula: |
Cu3Bi(SeO3)2O2Cl |
| Environment: |
Rare secondary mineral in an oxidized barite lens in Precambrian sedimenary iron formation. |
| IMA Status: |
Approved IMA 1990 |
| Locality: |
Iron Monarch quarry, Iron Knob, South Australia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Glyn Francis (1939-), Quality Control Officer at the Iron Monarch quarry, Australia who collected the mineral. |
| Name Pronunciation: |
Francisite + Pronunciation  |
| Synonym: |
ICSD 69385 |
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IMA1989-028 |
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PDF 46-1352 |
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