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.30b Aguilarite Ag4SeS
Space Group P 212121
Point Group 2 2 2
2.BA.30b Naumannite Ag2Se
Space Group P 212121
Point Group 2 2 2