data_global _chemical_name_mineral 'Ferrosilite III' loop_ _publ_author_name 'Weber H P' _journal_name_full 'Acta Crystallographica, Section C' _journal_volume 39 _journal_year 1983 _journal_page_first 1 _journal_page_last 3 _publ_section_title ; Ferrosilite III, the high-temperature polymorph of FeSiO3 ; _database_code_amcsd 0019764 _chemical_compound_source 'synthetic at 2 GPa and 1523 K for 20 h' _chemical_formula_sum 'Fe Si O3' _cell_length_a 6.628 _cell_length_b 7.467 _cell_length_c 22.607 _cell_angle_alpha 115.32 _cell_angle_beta 80.56 _cell_angle_gamma 95.49 _cell_volume 997.260 _exptl_crystal_density_diffrn 3.954 _symmetry_space_group_name_H-M 'P -1' loop_ _space_group_symop_operation_xyz 'x,y,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 FeM10 0.05134 0.45492 0.41889 0.07770 FeM11 0.19183 0.31543 0.25993 0.07600 FeM12 0.02977 0.46190 0.80630 0.07550 FeM13 0.11189 0.38982 0.03356 0.07730 FeM21 0.38922 0.13267 0.34072 0.08800 FeM22 0.19151 0.16975 0.48612 0.14810 FeM23 0.14528 0.32746 0.65097 0.07940 FeM24 0.30572 0.19380 0.10798 0.08890 FeM25 0.22018 0.27055 0.88125 0.08600 Si1 0.23845 0.86110 0.55161 0.07650 Si2 0.10381 0.97742 0.69403 0.06930 Si3 0.29602 0.78413 0.76288 0.06970 Si4 0.17754 0.90786 0.91198 0.07010 Si5 0.37389 0.71303 0.98406 0.07100 Si6 0.25880 0.83834 0.13461 0.06890 Si7 0.45657 0.63640 0.20414 0.06760 Si8 0.33723 0.75381 0.35205 0.07250 Si9 0.51498 0.58620 0.43131 0.07820 OA1 0.94446 0.30076 0.47750 0.09490 OA2 0.08465 0.18252 0.32587 0.08820 OA3 0.87004 0.39786 0.25959 0.08730 OA4 0.00986 0.25258 0.09949 0.09190 OA5 0.79999 0.46107 0.02991 0.09160 OA6 0.92235 0.32797 0.87490 0.08460 OA7 0.72228 0.53275 0.80546 0.08700 OA8 0.15208 0.59449 0.34803 0.08870 OA9 0.64791 0.59199 0.57816 0.09300 OA10 0.75615 0.55188 0.42593 0.10040 OB1 0.82961 0.93322 0.44377 0.10980 OB2 0.04924 0.20247 0.71484 0.09730 OB3 0.47985 0.25909 0.27872 0.09330 OB4 0.12298 0.13712 0.94131 0.09730 OB5 0.60186 0.65214 0.94768 0.09870 OB6 0.20211 0.06798 0.17184 0.09440 OB7 0.31271 0.42892 0.82596 0.08940 OB8 0.28470 0.98120 0.39679 0.09560 OC1 0.27855 0.89803 0.62649 0.09260 OC2 0.78920 0.03138 0.24698 0.08960 OC3 0.68131 0.13666 0.15953 0.10280 OC4 0.32208 0.87839 0.95909 0.10800 OC5 0.37516 0.83064 0.06372 0.10400 OC6 0.57162 0.21431 0.83012 0.09510 OC7 0.56301 0.22825 0.71604 0.09430 OC8 0.52014 0.67906 0.37630 0.09200 OC9 0.45147 0.77366 0.50325 0.09790