data_global _amcsd_formula_title 'SiC-VI' loop_ _publ_author_name 'Ramsdell L S' _journal_name_full 'American Mineralogist' _journal_volume 29 _journal_year 1944 _journal_page_first 519 _journal_page_last 525 _publ_section_title ; The crystal structure of alpha-SiC, type VI ; _database_code_amcsd 32 _chemical_formula_sum 'Si11 C11' _cell_length_a 3.073 _cell_length_b 3.073 _cell_length_c 82.94 _cell_angle_alpha 90.0 _cell_angle_beta 90.0 _cell_angle_gamma 120.0 _cell_volume 678.297 _exptl_crystal_density_diffrn 3.239 _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' '-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 Si 0.0 0.0 0.0 Si 0.0 0.0 0.061 Si 0.0 0.0 0.182 Si 0.0 0.0 0.242 Si 0.0 0.0 0.364 Si 0.0 0.0 0.455 Si 0.0 0.0 0.546 Si 0.0 0.0 0.636 Si 0.0 0.0 0.758 Si 0.0 0.0 0.818 Si 0.0 0.0 0.939 C 0.0 0.0 0.023 C 0.0 0.0 0.083 C 0.0 0.0 0.205 C 0.0 0.0 0.265 C 0.0 0.0 0.386 C 0.0 0.0 0.477 C 0.0 0.0 0.568 C 0.0 0.0 0.659 C 0.0 0.0 0.78 C 0.0 0.0 0.841 C 0.0 0.0 0.962