data_global _amcsd_formula_title 'Bi0.5 Cu Hg0.5 La0.5 O5 Sr1.5' loop_ _publ_author_name 'Pelloquin D' 'Michel C' 'Hervieu M' 'Studer F' 'Raveau B' _journal_name_full 'Physica C' _journal_volume 257 _journal_year 1996 _journal_page_first 195 _journal_page_last 209 _publ_section_title ; On the crystal structure of the "1201" superconductors Hg0.5Bi0.5Sr2-xLaxCuO5-d _cod_database_code 1001760 ; _database_code_amcsd 0015076 _chemical_formula_sum '(Hg.5 Bi.5) (Sr1.5 La.5) Cu O5' _cell_length_a 3.7769 _cell_length_b 3.7769 _cell_length_c 8.8252 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 125.891 _exptl_crystal_density_diffrn 7.244 _symmetry_space_group_name_H-M 'P 4/m m m' loop_ _space_group_symop_operation_xyz 'x,y,z' '-y,-x,z' 'y,x,-z' 'y,-x,-z' '-y,x,z' 'x,-y,z' '-x,y,-z' 'x,y,-z' '-x,-y,z' 'y,x,z' '-y,-x,-z' '-y,x,-z' 'y,-x,z' '-x,y,z' 'x,-y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy Hg1 0.00000 0.00000 0.00000 0.50000 Bi1 0.00000 0.00000 0.00000 0.50000 Sr1 0.50000 0.50000 0.29290 0.75000 La1 0.50000 0.50000 0.29290 0.25000 Cu1 0.00000 0.00000 0.50000 1.00000 O1 0.50000 0.00000 0.50000 1.00000 O2 0.00000 0.00000 0.22800 1.00000 O3 0.30100 0.50000 0.00000 0.10000 O4 0.38500 0.38500 0.00000 0.15000