AM_Wallisite Formula: (Pb Tl) Cu As2 S5 Name: Wallisite Unit cell: 9.215 8.524 7.98 55.983 62.5 69.4 , V=457.10 Space group: P-1 (2)

Takeuchi Y , Ohmasa M , Zeitschrift fur Kristallographie , 127 (1968) p.349-365, The crystal structure of wallisite, PbTlCuAs2S5,, the Cu analogue of hatchite PbTlAgAs2S5, Locality: Lengenbach quarry, Binnatal, Switzerland