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 = 950 deg C feldspar ; _database_code_amcsd 0000540 _chemical_compound_source 'Synthetic' _chemical_formula_sum '(Na.983 Ca.012 K.005) (Si3 Al) O8' _cell_length_a 8.2508 _cell_length_b 12.9489 _cell_length_c 7.1431 _cell_angle_alpha 91.161 _cell_angle_beta 116.169 _cell_angle_gamma 90.030 _cell_volume 684.755 _exptl_crystal_density_diffrn 2.546 _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 0.27800 0.00190 0.13710 0.98300 0.14768 Ca 0.27800 0.00190 0.13710 0.01200 0.14768 K 0.27800 0.00190 0.13710 0.00500 0.14768 Si1o 0.00860 0.17460 0.22100 0.75000 0.02748 Al1o 0.00860 0.17460 0.22100 0.25000 0.02748 Si1m 0.00720 0.81940 0.22530 0.75000 0.02736 Al1m 0.00720 0.81940 0.22530 0.25000 0.02736 Si2o 0.69510 0.11410 0.33630 0.75000 0.02786 Al2o 0.69510 0.11410 0.33630 0.25000 0.02786 Si2m 0.69380 0.88200 0.34650 0.75000 0.02799 Al2m 0.69380 0.88200 0.34650 0.25000 0.02799 Oa1 0.00160 0.13800 0.99520 1.00000 0.05041 Oa2 0.60330 0.99710 0.28310 1.00000 0.04078 Obo 0.82260 0.12820 0.21690 1.00000 0.05725 Obm 0.82220 0.85930 0.23230 1.00000 0.06016 Oco 0.02390 0.30050 0.26190 1.00000 0.04800 Ocm 0.02470 0.69330 0.24550 1.00000 0.04927 Odo 0.18940 0.11980 0.40010 1.00000 0.05155 Odm 0.18810 0.87360 0.41170 1.00000 0.05231