Manganoquadratite
Manganoquadratite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula AgMnAsS₃.
It crystallizes in the tetragonal crystal system (space group P4_322). It is a member of the Quadratite structural group.
Key properties: Mohs hardness 2–2.5; specific gravity 4.68; Reddish brown streak; Metallic luster.
IMA symbol Mqd, IMA status: approved, named in 2011.
Found in a complex vein-type polymetallic hydrothermal deposit.
It is found associated with Alabandite, Mn-rich calcite, Mn-rich sphalerite, proustite, pyrite, pyrrhotite, tennantite, argentotennantite, stannite.
The name refers to the essential manganese content and the close analogy of the formula and unit-cell dimensions with quadratite.
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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