data_global _amcsd_formula_title 'Al O3 Y' loop_ _publ_author_name 'Bertaut F' 'Mareschal J' _journal_name_full 'Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences' _journal_volume 257 _journal_year 1963 _journal_page_first 867 _journal_page_last 870 _publ_section_title ; Un nouveau type de structure hexagonale: Al T O3 (T = Y, Eu, Gd, Tb, Dy, Ho, Er). _cod_database_code 1008923 ; _database_code_amcsd 0016790 _chemical_formula_sum 'Y Al O3' _cell_length_a 3.680 _cell_length_b 3.680 _cell_length_c 10.52 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 123.379 _exptl_crystal_density_diffrn 4.411 _symmetry_space_group_name_H-M 'P 63/m m c' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-x+y,1/2+z' 'x,x-y,1/2-z' '-x+y,-x,1/2-z' 'x-y,x,1/2+z' '-y,-x,z' 'y,x,-z' 'y,-x+y,-z' '-y,x-y,z' 'x-y,-y,1/2+z' '-x+y,y,1/2-z' 'x,y,1/2-z' '-x,-y,1/2+z' 'x,x-y,z' '-x,-x+y,-z' 'x-y,x,-z' '-x+y,-x,z' 'y,x,1/2+z' '-y,-x,1/2-z' '-y,x-y,1/2-z' 'y,-x+y,1/2+z' '-x+y,y,z' 'x-y,-y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Y1 0.00000 0.00000 0.00000 Al1 0.33333 0.66667 0.25000 O1 0.00000 0.00000 0.25000 O2 0.33333 0.66667 0.07700