Agmantinite
Agmantinite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Ag₂MnSnS₄.
It crystallizes in the orthorhombic crystal system (space group Pn). It is a member of the Wurtzite structural group.
Key properties: Mohs hardness 2–2.5; specific gravity 4.608; Red streak; Adamantine luster.
IMA symbol Agm, IMA status: approved, named in 2014.
Found in the alabandite zone of a polymetallic hydrothermal mineral deposit.
It is found associated with Calcite, quartz, manganoquadratite, alabandite, proustite, probable kutnohorite, sphalerite, Pb-Sb-As-S minerals.
The name refers to its composition, Ag for silver, man for manganese, and tin.
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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