data_global _chemical_name_mineral 'Koutekite' loop_ _publ_author_name 'Liebisch W' 'Schubert K' _journal_name_full 'Journal of the Less-Common Metals' _journal_volume 23 _journal_year 1971 _journal_page_first 231 _journal_page_last 236 _publ_section_title ; Zur struktur der mischung kupfer-arsen ; _database_code_amcsd 0014136 _chemical_formula_sum 'Cu5 As2' _cell_length_a 5.977 _cell_length_b 11.577 _cell_length_c 5.491 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 379.954 _exptl_crystal_density_diffrn 8.174 _symmetry_space_group_name_H-M 'I b a m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' 'x,-y,1/2+z' '1/2+x,1/2-y,+z' '-x,y,1/2-z' '1/2-x,1/2+y,-z' '-x,y,1/2+z' '1/2-x,1/2+y,+z' 'x,-y,1/2-z' '1/2+x,1/2-y,-z' 'x,y,-z' '1/2+x,1/2+y,1/2-z' '-x,-y,z' '1/2-x,1/2-y,1/2+z' '-x,-y,-z' '1/2-x,1/2-y,1/2-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Cu1 0.33500 0.40900 0.00000 0.01393 Cu2 0.00000 0.26400 0.25000 0.01013 Cu3 0.50000 0.00000 0.25000 0.01013 As 0.23800 0.11800 0.00000 ?