Hendekasartorite

hendekasartorite

baumhauite

rathite

thallium

Images

Formula: Tl₂Pb₄₈As₈₂S₁₇₂
Valence: Tl¹⁺₂Pb²⁺₄₈As³⁺₈₂S^2-₁₇₂
Sulpharsenite of thallium and lead, sartorite group
Crystal System: Monoclinic
Specific gravity: 5.18 calculated
Hardness: 3 to 3½
Streak: Dark brown
Colour: lead-grey, grey; rare, deep red internal reflections
Environments

Sedimentary environments

Hendekasartorite was approved in 2015 and to date (March 2026) it has been reported only from the type locality.

Localities

At the type locality, the Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland, hendakasartorite, together with heptasartorite and enneasartorite, occur in dolostone as late sulphide phases in the Pb–Tl–Ag–As deposit, associated with baumhauerite and rathite (EJM 29.4.701-712, Mindat).
Hendekasartorite from the Lengenbach Quarry - Image

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