Tyrrellite
A variety of Minerals
What is Tyrrellite?
Tyrrellite is a selenide mineral that has a formula of Cu(Co,Ni)2Se4. It has been found in the Goldfields District in northern Saskatchewan, as well as in the Petrovice deposit, Czech Republic. 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.
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Key Characteristics
Formation of Tyrrellite
It was first described in 1953 for an occurrence in the Goldfields District, Saskatchewan, while the second occurrence was reported in Petrovice deposit, Czech Republic. In general, tyrrellite is veined, embayed and replaced by umangite, a primary mineral of deposits in which tyrellite is found. The relative scarcity and unique occurrences of tyrrellite can give geologists considerable insight into the circumstances under which the parent rock formed.
Quick Facts
Physical Properties
- Color
- Bronze
- Hardness (Mohs)
- 3.5
- Density
- 6.59 g/cm³
- Streak
- Black
Chemical Properties
- Chemical Formula
- Cu(Co3+,Ni3+)2Se4
- Elements
- Co, Cu, Ni, Se
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