Murdochite Christ C L, Clark J R American Mineralogist 40 (1955) 907-916 The crystal structure of murdochite ordered model _database_code_amcsd 0000076 9.210 9.210 9.210 90 90 90 Fm-3m atom x y z Pb 0 0 0 Cu 0 .25 .25 O1 .25 .25 .25 O2 .25 0 0