| Tyrrellite | |
|---|---|
 | |
| General | |
| Category | Selenide mineral Thiospinel group (Spinel structural group) |
| Formula (repeating unit) | Cu(Co,Ni)2Se4 |
| IMA symbol | Ty[1] |
| Strunz classification | 2.DA.05 |
| Crystal system | Isometric |
| Crystal class | Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m) |
| Space group | Fd3m |
| Unit cell | a= 10.005 Å; Z = 8 |
| Identification | |
| Color | light bronze |
| Crystal habit | granular |
| Cleavage | {001} Distinct |
| Fracture | conchoidal |
| Tenacity | brittle |
| Mohs scale hardness | 3.5 |
| Luster | metallic |
| Streak | black |
| Diaphaneity | Opaque |
| Specific gravity | 6.6 ± 0.2 |
| References | [2][3][4][5] |
Tyrrellite is a selenide mineral that has a chemical formula of Cu(Co,Ni)2Se4.[4] It has been found in the Goldfields District in northern Saskatchewan, as well as in the Petrovice deposit, Czech Republic.[3] It is named after the Canadian geologist Joseph Burr Tyrrell. Joseph Tyrrell was one of the first geologists from the Geological Survey of Canada to do research in the Goldfields District.[6]
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ Webmineral data
- ^ a b Handbook of Mineralogy
- ^ a b Mindat.org
- ^ Robinson, S.C. and Brooker, E.J. (1952) A cobalt-nickel-copper selenide from the Goldfields District, Saskatchewan. American Mineralogist, 37, 542-544.
- ^ Harris, D.C. (1970) New Data on Tyrrellite. The Canadian Mineralogist, 10, 731-735.