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Formula: Ag2Pb12-xTlx/2As18+x/2S40
Sulphosalt, sulpharsenite,
sartorite group,
thallium-bearing mineral
Crystal System: Monoclinic
Specific gravity: 5.33 to 5.41 measured, 5.31 calculated
Hardness: 3
Streak: Chocolate brown
Colour: Silver to lead-grey, tarnishes iridescent
Environments
Metamorphic environments
Hydrothermal environments
Rathite occurs in crystalline dolostone with other
lead-arsenic-sulphur
minerals. Associated minerals include liveingite,
baumhauerite, sartorite,
hutchinsonite, dufrénoysite,
tennantite and pyrite.
(HOM).
Localities
The type locality is the Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland.
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