data_global _amcsd_formula_title 'Cr3 Se4' loop_ _publ_author_name 'Chevreton M' 'Bertaut F' _journal_name_full 'Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences' _journal_volume 253 _journal_year 1961 _journal_page_first 145 _journal_page_last 147 _publ_section_title ; Etude de seleniures de chrome. _cod_database_code 1008921 ; _database_code_amcsd 0016788 _chemical_formula_sum 'Cr3 Se4' _cell_length_a 6.299 _cell_length_b 3.607 _cell_length_c 11.731 _cell_angle_alpha 90 _cell_angle_beta 91.87 _cell_angle_gamma 90 _cell_volume 266.392 _exptl_crystal_density_diffrn 5.882 _symmetry_space_group_name_H-M 'I 1 2/m 1' loop_ _space_group_symop_operation_xyz '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' '-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 Cr1 0.00000 0.00000 0.50000 Cr2 0.02200 0.00000 0.24000 Se1 0.33600 0.00000 0.86600 Se2 0.32900 0.00000 0.37900