2 SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
2.B Metal Sulfides, M:S > 1:1 (mainly 2:1)
2.BA With Cu, Ag, Au
2.BA.40a Fischesserite Ag3AuSe2
Space Group I 4132
Point Group 4 3 2
2.BA.40a Petzite Ag3AuTe2
Space Group I 4132
Point Group 4 3 2