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Formula: Ag2ZnSnS4
Sulphide, stannite group, forms a series with
hocartite, silver-,
zinc- and tin- bearing mineral
Crystal System: Tetragonal
Specific gravity: 4.822 calculated
Hardness: 4
Colour: Black
Common impurities: Cu,Fe
Environments
Localities
At the type locality, the Pirquitas Ag-Sn Deposit, Mina Pirquitas, Rinconada Department, Jujuy Province, Argentina,
pirquisite occurs as irregular grains, to 0.5 mm, with hocartite,
pyrite, marcasite,
wurtzite, franckeite,
miargyrite, aramayoite,
chalcostibite, stannite,
kësterite, rhodostannite and
cassiterite
(AM 68, 1249).
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