data_global _chemical_name_mineral 'Sanidine-Ga' loop_ _publ_author_name 'Kimata M' 'Saito S' 'Shimizu M' _journal_name_full 'European Journal of Mineralogy' _journal_volume 7 _journal_year 1995 _journal_page_first 287 _journal_page_last 293 _publ_section_title ; Structure of sanidine-type KGaSi3O8: Tetrahedral-site disordering in potassium feldspar ; _database_code_amcsd 6587 _chemical_formula_sum 'K (Ga Si3) O8' _cell_length_a 8.66 _cell_length_b 13.102 _cell_length_c 7.229 _cell_angle_alpha 90.0 _cell_angle_beta 116.06 _cell_angle_gamma 90.0 _cell_volume 736.838 _exptl_crystal_density_diffrn 2.894 _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 _atom_site_occupancy _atom_site_U_iso_or_equiv K 0.28639 0.0 0.13908 1.0 0.02907 GaT1 0.00788 0.18626 0.22166 0.28 0.0127 SiT1 0.00788 0.18626 0.22166 0.72 0.0127 GaT2 0.70981 0.11798 0.3436 0.22 0.01329 SiT2 0.70981 0.11798 0.3436 0.78 0.01329 OA1 0.0 0.1454 0.0 1.0 0.03161 OA2 0.63826 0.0 0.28379 1.0 0.02955 OB 0.82618 0.14775 0.22312 1.0 0.07285 OC 0.03428 0.31151 0.2583 1.0 0.02684 OD 0.17916 0.12596 0.40465 1.0 0.02709 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 K 0.01821 0.03487 0.03045 0.0 0.00729 0.0 GaT1 0.01245 0.01348 0.01222 -0.00243 0.0055 -0.00142 SiT1 0.01245 0.01348 0.01222 -0.00243 0.0055 -0.00142 GaT2 0.01233 0.01157 0.01481 -0.00046 0.00486 0.00022 SiT2 0.01233 0.01157 0.01481 -0.00046 0.00486 0.00022 OA1 0.03937 0.02852 0.02547 0.0 0.01293 0.0 OA2 0.02615 0.02174 0.03269 0.0 0.00548 0.0 OB 0.02759 0.04487 0.03664 -0.00356 0.01825 0.00336 OC 0.02505 0.02539 0.02715 -0.00227 0.00875 -0.00181 OD 0.02882 0.02548 0.02136 0.0017 0.00586 0.00375