data_global _amcsd_formula_title 'Cu8 La6.4 O20 Sr1.6' loop_ _publ_author_name 'Er Rakho L' 'Michel C' 'Raveau B' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 73 _journal_year 1988 _journal_page_first 514 _journal_page_last 519 _publ_section_title ; La8-x Srx Cu8 O20: An Oxygen-Deficient Perovskite Built of CuO6, CuO5, and CuO4 Polyhedra _cod_database_code 1001365 ; _database_code_amcsd 0013615 _chemical_formula_sum '(La1.6 Sr.4) Cu2 O5' _cell_length_a 10.8461 _cell_length_b 10.8461 _cell_length_c 3.8631 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 454.447 _exptl_crystal_density_diffrn 6.787 _symmetry_space_group_name_H-M 'P 4/m b m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-y,1/2-x,z' '1/2+y,1/2+x,-z' 'y,-x,-z' '-y,x,z' '1/2+x,1/2-y,z' '1/2-x,1/2+y,-z' 'x,y,-z' '-x,-y,z' '1/2+y,1/2+x,z' '1/2-y,1/2-x,-z' '-y,x,-z' 'y,-x,z' '1/2-x,1/2+y,z' '1/2+x,1/2-y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy La1 0.26210 0.46930 0.50000 0.80000 Sr1 0.26210 0.46930 0.50000 0.20000 Cu1 0.00000 0.00000 0.00000 1.00000 Cu2 0.50000 0.00000 0.00000 1.00000 Cu3 0.21960 0.71960 0.00000 1.00000 O1 0.00000 0.00000 0.50000 1.00000 O2 0.50000 0.00000 0.50000 1.00000 O3 0.21690 0.71690 0.50000 1.00000 O4 0.37570 0.87570 0.00000 1.00000 O5 0.16150 0.09600 0.00000 1.00000