data_global _chemical_name_mineral 'Enstatite' loop_ _publ_author_name 'Morimoto N' 'Koto K' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 129 _journal_year 1969 _journal_page_first 65 _journal_page_last 83 _publ_section_title ; The crystal structure of orthoenstatite ; _database_code_amcsd 0010680 _chemical_compound_source 'Bishopville meteorite' _chemical_formula_sum 'Mg Si O3' _cell_length_a 18.210 _cell_length_b 8.812 _cell_length_c 5.178 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 830.896 _exptl_crystal_density_diffrn 3.210 _symmetry_space_group_name_H-M 'P b c a' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,1/2+z' '-x,1/2+y,1/2-z' '1/2-x,1/2+y,z' '1/2+x,1/2-y,-z' '1/2+x,y,1/2-z' '1/2-x,-y,1/2+z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Mg1 0.37600 0.65440 0.86630 0.00874 Mg2 0.37690 0.48540 0.36090 0.00975 SiA 0.27160 0.34110 0.04940 0.00709 SiB 0.47400 0.33730 0.79880 0.00811 O1A 0.18320 0.33860 0.03490 0.00874 O2A 0.31180 0.50220 0.04300 0.01229 O3A 0.30360 0.22520 -0.16980 0.01444 O1B 0.56280 0.33820 0.80090 0.00849 O2B 0.43370 0.48410 0.68800 0.00899 O3B 0.44700 0.19610 0.60040 0.01229