Tsnigriite
Tsnigriite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Ag₉SbTe₃S₃.
It crystallizes in the monoclinic crystal system.
Key properties: specific gravity 7.38; Metallic. Bireflectance: Weak. Anisotropism: Brown and gray luster.
IMA symbol Tng, IMA status: approved, named in 1991.
Found in hydrothermal polymetallic gold silver or lead zinc deposits.
It is found associated with Galena, sphalerite, pyrrhotite, falkmanite (Bethumi, India); hessite, mercurian gold, trellurian canfieldite or quartz, tetrahedrite.
An acronym derived from the initials of the Russian name for the Central Scientific Research Institute of Geological Prospecting in Moscow.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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