data_global _amcsd_formula_title 'Al2O3' loop_ _publ_author_name 'Husson E' 'Repelin Y' _journal_name_full 'European Journal of Solid State and Inorganic Chemistry' _journal_volume 33 _journal_year 1996 _journal_page_first 1223 _journal_page_last 1231 _publ_section_title ; Structural studies of transition aluminas. Theta alumina _cod_database_code 1200005 ; _database_code_amcsd 0018285 _chemical_formula_sum 'O3 Al2' _cell_length_a 11.795 _cell_length_b 2.91 _cell_length_c 5.621 _cell_angle_alpha 90 _cell_angle_beta 103.79 _cell_angle_gamma 90 _cell_volume 187.371 _exptl_crystal_density_diffrn 3.614 _symmetry_space_group_name_H-M 'C 1 2/m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,z' '1/2+x,1/2-y,z' '-x,y,-z' '1/2-x,1/2+y,-z' '-x,-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z O1 0.16268 0.00000 0.12276 O2 0.48945 0.00000 0.26127 O3 0.82995 0.00000 0.43863 Al1 0.10134 0.00000 0.79440 Al2 0.35235 0.00000 0.68739