Ca Cu2 La2 O6.037 Fuertes A, Obradors X, Navarro J, Gomez-Romero P, Casan-Pastor N, Perez F, Fontcuberta J, Miravitlles C Rodriguez-Carvajal J, Martinez B Physica C 170 (1990) 153-160 Oxygen excess and superconductivity at 45 K in La2 Ca Cu2 O6+y _cod_database_code 1006107 _database_code_amcsd 0015020 3.82820 3.82820 19.4498 90 90 90 I4/mmm atom x y z occ Ca1 0 0 0 .77 La1 0 0 0 .23 La2 0 0 .1756 .885 Ca2 0 0 .1756 .115 Cu1 0 0 .5853 O1 0 .5 .0821 O2 0 0 .7040 O3 0 0 .5 .037