Alburnite
Alburnite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Ag₈GeTe₂S₄.
It crystallizes in the cubic crystal system (space group F-43m). It is a member of the Argyrodite structural group.
Key properties: Mohs hardness 4; specific gravity 7.828; Metallic luster.
IMA symbol Alb, IMA status: approved, named in 2012.
Found in an epithermal hydrothermal Au-Ag vein.
It is found associated with Tetrahedrite, galena, pyrite, sphalerite, chalcopyrite, hessite, altaite, sylvanite, rhodochrosite, quartz, calcite, rhodonite.
The name comes from the Latin name for the locality that produced the first specimens, known during the Roman period as Alburnus Maior.
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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