Formula: Bi11.3 Pb.7 Cu.7 (S14.94 Se3.06)
Name: Pekoite
Unit cell: 11.472 33.744 4.016 90.0 90.0 90.0 , V=1554.64
Space group: P21AM (26)

Mumme W G , Watts J A , The Canadian Mineralogist , 14 (1976) p.322-333, Pekoite, CuPbBi11S18, a new member of the bismuthinite-alkinite mineral series:, its crystal structure and relationship with naturally- and synthetically-formed members, Note: x-coordinate of S18 changed in order to generate reported bond lengths.