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Formula: Ag2S
Sulphide, isometric paramorph of acanthite,
which is monoclinic.
Argentite is not recognised by the IMA as a distinct mineral species. It is the high-temperature form of silver sulphide,
only stable over 177oC. Below this temperature,
argentite converts to acanthite.
Crystal system: Isometric
Localities
At the Mount Lyell Mines, Queenstown district, West Coast municipality, Tasmania, Australia, acanthite
pseudomorphs after argentite have been found in a vein
of chalcocite, bornite and
tetrahedrite between massive pyrite and
hematite bodies
(AJM 21.2.21).
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