data_global _chemical_name_mineral 'Cuprostibite' loop_ _publ_author_name 'Elander M' 'Haegg G' 'Westgren A' _journal_name_full 'Arkiv for Kemi, Mineralogi och Geologi' _journal_volume B12 _journal_year 1935 _journal_page_first 1 _journal_page_last 6 _publ_section_title ; The crystal structure of Cu2Sb and Fe2As ; _database_code_amcsd 0016974 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Cu2 Sb' _cell_length_a 3.992 _cell_length_b 3.992 _cell_length_c 6.091 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 97.067 _exptl_crystal_density_diffrn 8.514 _symmetry_space_group_name_H-M 'P 4/n m m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-y,1/2-x,z' 'y,x,-z' 'y,-x,-z' '1/2-y,1/2+x,z' 'x,-y,z' '1/2-x,1/2+y,-z' '1/2+x,1/2+y,-z' '-x,-y,z' '1/2+y,1/2+x,z' '-y,-x,-z' '-y,x,-z' '1/2+y,1/2-x,z' '-x,y,z' '1/2+x,1/2-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Cu1 0.00000 0.00000 0.00000 Cu2 0.00000 0.50000 0.27000 Sb1 0.00000 0.50000 -0.30000