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|English and Italian synonym of:||Acanthite|
The name 'argentite' refers to the high-temperature form of silver sulphide, only stable over 177 °C. Under this temperature any samples of 'argentite' convert to acanthite.
The name argentite is therefore used (confusingly) by some to describe pseudo-cubic pseudomorphs of silver sulphide (acanthite) where the original crystal form of the high-temperature cubic argentite has remained. The correct way to label such specimens would "acanthite, pseudo-cubic" or "acanthite, pseudomorphous after argentite".