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]
^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.
Tyrrellite is a selenide mineral that has a chemical formula of Cu(Co,Ni)2Se4. It has been found in the Goldfields District in northern Saskatchewan, as...