data_global _amcsd_formula_title 'Cr7C3' loop_ _publ_author_name 'Rouault M' 'Herpin P' 'Fruchart M' _journal_name_full 'Annales de Chimie' _journal_volume 5 _journal_year 1970 _journal_page_first 461 _journal_page_last 470 _publ_section_title ; Etude cristallographique des carbures Cr7C3 et Mn7C3 _cod_database_code 1009019 ; _database_code_amcsd 0016881 _chemical_formula_sum 'Cr7 C3' _cell_length_a 7.01 _cell_length_b 12.142 _cell_length_c 4.526 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 385.232 _exptl_crystal_density_diffrn 6.897 _symmetry_space_group_name_H-M 'P m c n' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-x,y,z' '1/2+x,-y,-z' '1/2+x,1/2+y,1/2-z' '1/2-x,1/2-y,1/2+z' 'x,1/2-y,1/2+z' '-x,1/2+y,1/2-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Cr1 0.06400 0.81100 0.05600 Cr2 0.25000 0.62600 0.05700 Cr3 0.25000 0.20600 0.25000 Cr4 0.25000 0.41600 0.26100 Cr5 0.06500 0.02100 0.25000 C1 0.25000 0.56200 0.45900 C2 0.02900 0.34200 0.02800