PbS
Skums, V.F.Pink, R.L.Allasov, M.R.
Inorganic Materials (USSR) (see: Izv.Akad.Nauk, Neorg.Mater.) (1991) 27, 1336-1340
a=5.996Å b=5.996Å c=5.996Å
α=90° β=90° γ=90°
Pb2SSe
a=6.029Å b=6.029Å c=6.029Å