data_global _chemical_name_mineral 'Laitakarite' loop_ _publ_author_name 'Stasova M M' _journal_name_full 'Izvestiya Akademii Nauk SSSR' _journal_volume 4 _journal_year 1968 _journal_page_first 28 _journal_page_last 31 _publ_section_title ; The crystal structure of bismuthum selenide Bi4Se3 ; _database_code_amcsd 0012737 _chemical_formula_sum 'Bi4 Se3' _cell_length_a 4.27 _cell_length_b 4.27 _cell_length_c 40 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 631.606 _exptl_crystal_density_diffrn 8.461 _symmetry_space_group_name_H-M 'R -3 m' loop_ _space_group_symop_operation_xyz 'x,y,z' '2/3+x,1/3+y,1/3+z' '1/3+x,2/3+y,2/3+z' 'x,x-y,z' '2/3+x,1/3+x-y,1/3+z' '1/3+x,2/3+x-y,2/3+z' 'y,x,-z' '2/3+y,1/3+x,1/3-z' '1/3+y,2/3+x,2/3-z' '-x+y,y,z' '2/3-x+y,1/3+y,1/3+z' '1/3-x+y,2/3+y,2/3+z' '-x,-x+y,-z' '2/3-x,1/3-x+y,1/3-z' '1/3-x,2/3-x+y,2/3-z' '-y,-x,z' '2/3-y,1/3-x,1/3+z' '1/3-y,2/3-x,2/3+z' 'x-y,-y,-z' '2/3+x-y,1/3-y,1/3-z' '1/3+x-y,2/3-y,2/3-z' 'y,-x+y,-z' '2/3+y,1/3-x+y,1/3-z' '1/3+y,2/3-x+y,2/3-z' '-x+y,-x,z' '2/3-x+y,1/3-x,1/3+z' '1/3-x+y,2/3-x,2/3+z' '-x,-y,-z' '2/3-x,1/3-y,1/3-z' '1/3-x,2/3-y,2/3-z' '-y,x-y,z' '2/3-y,1/3+x-y,1/3+z' '1/3-y,2/3+x-y,2/3+z' 'x-y,x,-z' '2/3+x-y,1/3+x,1/3-z' '1/3+x-y,2/3+x,2/3-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Bi1 0.00000 0.00000 0.14450 0.01013 Bi2 0.00000 0.00000 0.28700 0.01013 Se1 0.00000 0.00000 0.41700 0.01013 Se2 0.00000 0.00000 0.00000 0.01013