Eskebornite
A variety of Chalcopyrite Group
What is Eskebornite?
Eskebornite is a selenide mineral with the formula CuFeSe2. It crystallizes in the tetragonal system and it has a brassy colour. Eskebornite is sometimes found as thick tabular crystals, but is more often found intergrown with other selenides. It is part of the chalcopyrite group and forms a series with chalcopyrite.
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Key Characteristics
Formation of Eskebornite
Eskebornite was first identified in 1949 by Paul Ramdohr in the Eskaborn Adit, Tilkerode (Abberode), Harz, Saxony-Anhalt, Germany, which it was also named after. It is often found with other selenides, including clausthalite, tiemannite, berzelianite, naumannite, umangite, geffroyite, and chaméanite, but also with other minerals like chalcopyrite, uraninite, ankerite, and dolomite.
Quick Facts
Physical Properties
- Color
- Brass yellow
- Hardness (Mohs)
- 3 - 3.5
- Density
- 5.44 g/cm³
- Streak
- Black
Chemical Properties
- Chemical Formula
- CuFeSe2
- Elements
- Cu, Fe, Se
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