• Source: Kuramite

Kuramite is a mineral of the stannite group. It is named after the Kochbulak Au-Ag-Te deposit locality in the Chatkal-Kuraminskii Mountains in Uzbekistan, where it was first discovered.




Occurrence


Kuramite occurs in gold-sulfide-quartz veins as inclusions in goldfieldite, as observed in the Kochbulak deposit in Uzbekistan. It may also occur as microscopic crystals.
Kuramite has also been found in the Arctic Ocean, Argentina, Chile, DR Congo, Greece, Hungary, Japan, United Kingdom, and USA.




Physical properties


Kuramite's hardness on the Mohs scale is 5, and it has a density of 4.56. It is an opaque steel grey color with a metallic luster and a metallic streak.




Chemical properties


The chemical formula of Kuramite is Cu3SnS4 with common impurities being iron, zinc and indium (Fe, Zn, and In).




X-ray powder pattern


X-ray study of Kuramite was done using the powder method, in the mineralogical laboratory of IGEM, Academy of Sciences of the USSR, by G. V. Vasova (RKO-57.3, unfiltered FeK). Kuramite was found to relate to the stannite-kesterite group. The parameters of the unit cell are found to be a=5.445±0.005 Å, c=10.75±0.02 Å, c/a=1.972.




See also


List of minerals




References

Kata Kunci Pencarian:

• Kuramite
• List of mineral symbols
• Sulfide mineral
• Mohite
• List of minerals recognized by the International Mineralogical Association (K)
• Classification of non-silicate minerals
• Thiostannate