Enneasartorite

enneasartorite

rathite

baumhauerite

heptasartorite

Images

Formula: Tl₆Pb₃₂As₇₀S₁₄₀
Valence: Tl¹⁺₆Pb²⁺₃₂As³⁺₇₀S^2-₁₄₀
Sulpharsenite of thallium and lead, sartorite group
Crystal system: Mooclinic
Specific gravity: 5.1 calculated
Hardness: 3 to 3½
Streak: Dark brown, rare deep red internal reflections
Colour: Lead-grey, grey
Environments

Sedimentary environments

Physical and optical properties of enneasartorite, heptasartorite and hendekasartorite are very similar, so that chemical analysis and/or single-crystal X-ray diffraction is needed to distinguish them.

Localities

At the type locality, the Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland, enneasartorite belongs to the late sulphide phases in the Pb–Tl–Ag–As deposit (EJM 29.4.701-712).
It occurs in dolostone associated with heptasartorite, rathite and baumhauerite (HOM).
Enneasartorite from the Lengenbach Quarry - Image

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