data_global _chemical_name_mineral 'Albite' loop_ _publ_author_name 'Prewitt C T' 'Sueno S' 'Papike J J' _journal_name_full 'American Mineralogist' _journal_volume 61 _journal_year 1976 _journal_page_first 1213 _journal_page_last 1225 _publ_section_title ; The crystal structures of high albite and monalbite at high temperatures T = 750 deg C feldspar ; _database_code_amcsd 0000539 _chemical_compound_source 'Synthetic' _chemical_formula_sum '(Na.983 Ca.012 K.005) (Si3 Al) O8' _cell_length_a 8.2296 _cell_length_b 12.9336 _cell_length_c 7.1357 _cell_angle_alpha 91.956 _cell_angle_beta 116.232 _cell_angle_gamma 90.078 _cell_volume 680.780 _exptl_crystal_density_diffrn 2.561 _symmetry_space_group_name_H-M 'C -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' 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 Na 0.27690 0.00290 0.13740 0.98300 0.13678 Ca 0.27690 0.00290 0.13740 0.01200 0.13678 K 0.27690 0.00290 0.13740 0.00500 0.13678 Si1o 0.00870 0.17180 0.21890 0.75000 0.02394 Al1o 0.00870 0.17180 0.21890 0.25000 0.02394 Si1m 0.00660 0.81770 0.22680 0.75000 0.02343 Al1m 0.00660 0.81770 0.22680 0.25000 0.02343 Si2o 0.69400 0.11230 0.33160 0.75000 0.02381 Al2o 0.69400 0.11230 0.33160 0.25000 0.02381 Si2m 0.69190 0.88050 0.34940 0.75000 0.02394 Al2m 0.69190 0.88050 0.34940 0.25000 0.02394 Oa1 0.00300 0.13740 0.99120 1.00000 0.04559 Oa2 0.60120 0.99510 0.28250 1.00000 0.03610 Obo 0.82210 0.12250 0.21140 1.00000 0.04889 Obm 0.82160 0.85480 0.23700 1.00000 0.05370 Oco 0.02260 0.29740 0.26700 1.00000 0.04129 Ocm 0.02420 0.69150 0.23760 1.00000 0.04281 Odo 0.19120 0.11750 0.39510 1.00000 0.04445 Odm 0.18820 0.87140 0.41660 1.00000 0.04686