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Crookesite from
Skrikerum Mine, Valdemarsvik, Östergötland County, Sweden
| Locality type: | Mine | |
| Classification | ||
|---|---|---|
| Species: | Crookesite | |
| Formula: | Cu7(Tl, Ag)Se4 | |
| Comments: | Found as finely disseminated grains in calcite. Invidual grains of the mineral are not visible to the naked eye but can be seen with a binocular microscope. Crookesite is lead-grey on a fresh surface, brittle when crushed with a needle and shows two fairly well developed cleavages at right angles. | |
| Habit: | masses up to 5 x 5 x 2 cm | |
| Confirmation | ||
| Validity: | Valid - Type Locality | |
| Associated Minerals Based on Photo Data: | ||
| Calcite | 34 | |
| Pyrobitumen | 21 | |
| - var Thucholite | 21 | |
| Eucairite | 20 | |
| Klockmannite | 17 | |
| Clausthalite | 13 | |
| Bukovite | 9 | |
| Umangite | 9 | |
| Berzelianite | 3 | |
| Biotite | 2 | |
| Covellite | 2 | |
| Athabascaite | 1 | |
| Data | ||
| Mineral Data: | Click here to view Crookesite data | |
| Locality Data: | Click here to view Skrikerum Mine, Valdemarsvik, Östergötland County, Sweden | |
| Photo Gallery | View Gallery (16 photos) | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 4100 | |
| Long-form Identifier: | 1:3:4100:3 | |
| GUID (UUID V4): | 0 | |
| References | ||
Earley, J. W. (1950) Description and synthesis of the selenide minerals. American Mineralogist, 35 (5-6) 337-364 | ||
Skrikerum Mine, Valdemarsvik, Östergötland County, Sweden