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Crookesite Mineral Data
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General Crookesite Information
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 Chemical Formula: |
Cu7(Tl,Ag)Se4 |
| Composition: |
Molecular Weight = 940.92 gm |
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Thallium 16.29 % Tl |
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Copper 47.28 % Cu |
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Silver 2.87 % Ag |
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Selenium 33.57 % Se |
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______ |
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100.00 % |
| Empirical Formula: |
Cu7Tl0.75Ag0.25Se4 |
| Environment: |
Of hydrothermal origin, with other selenides. |
| IMA Status: |
Valid Species (Pre-IMA) 1866 |
| Locality: |
From Skrikerum, near Tryserum, Kalmar, Sweden. Link to MinDat.org Location Data. |
| Name Origin: |
After Sir William Crookes (1832-1919), who discovered thallium. |
| Synonym: |
ICSD 69104 |
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PDF 41-1457 |
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