Murdochite Christ C L, Clark J R American Mineralogist 40 (1955) 907-916 The crystal structure of murdochite disordered model _database_code_amcsd 0000075 9.210 9.210 9.210 90 90 90 Fm3m atom x y z occ Pb 0 0 0 Cu1 .5 .5 .5 .857 Cu2 0 .25 .25 .857 O1 .25 .25 .25 O2 .25 0 0