data_global _chemical_name_mineral 'Sanidine' loop_ _publ_author_name 'Ohashi Y' 'Finger LW' _journal_name_full 'Carnegie Institution of Washington: Yearbook' _journal_volume 73 _journal_year 1974 _journal_page_first 539 _journal_page_last 544 _publ_section_title ; Refinement of the crystal structure of sanidine at 25 and 400C Note: T = 25 C ; _database_code_amcsd 0020564 _chemical_compound_source 'Laacher See, Eifel District, Germany' _chemical_formula_sum '(K.86 Na.14) (Si3 Al) O8' _cell_length_a 8.543 _cell_length_b 13.021 _cell_length_c 7.183 _cell_angle_alpha 90 _cell_angle_beta 115.980 _cell_angle_gamma 90 _cell_volume 718.281 _exptl_crystal_density_diffrn 2.553 _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 0.28400 0.00000 0.13710 0.86000 0.02723 Na 0.28400 0.00000 0.13710 0.14000 0.02723 SiT1 0.00930 0.18440 0.22380 0.68000 0.01051 AlT1 0.00930 0.18440 0.22380 0.32000 0.01051 SiT2 0.70760 0.11770 0.34430 0.82000 0.01051 AlT2 0.70760 0.11770 0.34430 0.18000 0.01051 Oa1 0.00000 0.14610 0.00000 1.00000 0.02014 Oa2 0.63400 0.00000 0.28550 1.00000 0.02014 Ob 0.82770 0.14540 0.22780 1.00000 0.02305 Oc 0.03880 0.30980 0.25770 1.00000 0.01824 Od 0.18120 0.12640 0.40520 1.00000 0.01887