Cl4 Cu H12 N2 O2 Chrobak L Zeitschrift fur Kristallographie 88 (1934) 35-47 Quantitative spectrometric studies of ammonium and of potassium cupric chloride dihydrate (N H4)2 Cu Cl4 (H2 O)2 and K2 Cu Cl4 (H2 O)2 _cod_database_code 1010007 _database_code_amcsd 0016943 7.58 7.58 7.95 90 90 90 P4_2/mnm atom x y z Cu1 0 0 0 N1 0 .5 .25 O1 0 0 .25 Cl1 .218 .218 .248