Chatkalite
A variety of Minerals
What is Chatkalite?
Chatkalite is a copper, iron, tin sulfide mineral with formula Cu6FeSn6S8. It crystallizes in the tetragonal crystal system and forms as rounded dissemations within tetrahedrite in quartz veins.
Etymology & Origins
Chatkalite was discovered in 1981 around the Chatkal Mountains of Uzbekistan in an unknown locality. It was given the name chatkalite because of this region where it was discovered.
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Key Characteristics
Characteristics of Chatkalite
Chatkalite can have sizes ranging from rounded grains of about 100 micron when found within a tetrahedrite. It has a metallic luster, a hardness of 274 on the Vickers scale and a hardness of 4.5 on the Mohs scale. It has a color of pale rose in reflected light with no internal reflection. Its diaphaneity can be described as opaque. It does not exhibit any cleavage or twinning properties. Chatkalite is anisotropic which is characteristic of the stannite group. Its anisotropic intensity is a weak shade of brown.
Quick Facts
Physical Properties
- Hardness (Mohs)
- 4.5
- Density
- 5 g/cm³
Chemical Properties
- Chemical Formula
- Cu6FeSn2S8
- Elements
- Cu, Fe, S, Sn
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