AM_Betekhtinite
Formula: Pb2 Cu21.332 S15
Name: Betekhtinite
Unit cell: 3.86 14.67 22.8 90.0 90.0 90.0 , V=1291.08
Space group: IMMM (71)

Dornberger-Schiff K , Hohne E , Acta Crystallographica , 12 (1959) p.646-651, Die kristallstruktur des betechtinit Pb2(Cu,Fe)21S15