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Formula: CuPbTlAs2S5
Valence: Cu1+Pb2+Tl1+As3+2S2-5
Sulpharsenite of copper,
lead and
thallium
Specific gravity: 5.71 calculated
Colour: Lead-grey
Environments
Localities
At the type locality, the Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland, wallisite is found
overgrowing other lead sulfosalts, in association with
dufrénoysite, rathite and
pyrite
(HOM).
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