Carlinite
Carlinite is a very rare mineral that belongs to the mineral class of Sulfide and Sulfosalt mineral. It crystallizes in the Hexagonal crystal family and has the chemical formula Tl2S. It is a particular form of thallium(I) sulfide. It forms Euhedral and anhedral in a poorly developed rhombic form. The mineral has a gray color, metallic Lustre (mineralogy) and is associated with gold, and lacks Hardness.
Etymology and history
Calnilite was discovered in 1975 by Arthur S. Radke and Franck W. Dickson.Its name was reference to the gold mine in Carlin, Nevada, where it was discovered.
Classification
According to the classification of minerals used by the International Mineralogical Association (IMA), carlinite is classified mineralogicaly sulphides and sulphosalts. It appears in the subgroup "Métalic sulfurs with métal / sulfur ratio supérior to 1:1". This group can be subdivided according to the concerned metal, placing the mineral in the subgroup with Mercury (element) and thallium according to his composition
According to the James Dwight Dana mineral classification carlinite can be assigned to the" sulfides and sulfosalts" and the subclass of "sulfures" taking into account selenides and tellurides " AmBnXp, with (m+n):p=2:1".
Crystalline structure
Calinite crystallises in a trigonal crystalline system according to Lattice constant structur a = 12:12 Å and c = 18.18 Å. It can be definied by 27 unite form per Unit cell#Primitive cell.
Properties
Present under the form of thallium(I), air oxidizes carlinite making it dimmer and lose its shine.
Extraction and usage
Only two carlinite extraction sites are known. Both can be found in the Lynn district of Nevada.
Calinite is often found in alloys with gold, arsenic, antimony, mercury and thallium(III) oxide, but also with Chemical compound and quartz
References
External links
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