data_global _amcsd_formula_title '(Li.85Mg.09Fe.06)(Fe.85Mg.15)Si2O6' loop_ _publ_author_name 'Camara F' 'Iezzi G' 'Oberti R' _journal_name_full 'Physics and Chemistry of Minerals' _journal_volume 30 _journal_year 2003 _journal_page_first 20 _journal_page_last 30 _publ_section_title ; HT-XRD study of synthetic ferrian magnesian spodumene: the effect of site dimension on the P2_1/c - C2/c phase transition Sample: T = 25 C ; _database_code_amcsd 0008740 _chemical_formula_sum 'Li.85 Mg.24 Fe.91 Si2 O6' _cell_length_a 9.638 _cell_length_b 8.709 _cell_length_c 5.258 _cell_angle_alpha 90 _cell_angle_beta 109.83 _cell_angle_gamma 90 _cell_volume 415.172 _exptl_crystal_density_diffrn 3.435 _symmetry_space_group_name_H-M 'P 1 21/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,1/2+z' '-x,1/2+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_occupancy _atom_site_U_iso_or_equiv LiM2 0.25200 0.01390 0.23140 0.85000 0.01500 MgM2 0.25200 0.01390 0.23140 0.09000 0.01500 FeM2 0.25200 0.01390 0.23140 0.06000 0.01500 FeM1 0.25020 0.64800 0.23400 0.85000 0.00600 MgM1 0.25020 0.64800 0.23400 0.15000 0.00600 SiA 0.04700 0.33920 0.27920 1.00000 0.00500 SiB 0.54880 0.83860 0.25050 1.00000 0.00500 O1A 0.86740 0.33370 0.16570 1.00000 0.00600 O1B 0.36840 0.83530 0.13420 1.00000 0.00700 O2A 0.11740 0.50730 0.31590 1.00000 0.00900 O2B 0.62320 0.00060 0.35850 1.00000 0.00900 O3A 0.10810 0.26710 0.58510 1.00000 0.00900 O3B 0.60490 0.72050 0.50660 1.00000 0.01000