data_global _chemical_name_mineral 'Albite' loop_ _publ_author_name 'Winter J K' 'Ghose S' 'Okamura F P' _journal_name_full 'American Mineralogist' _journal_volume 62 _journal_year 1977 _journal_page_first 921 _journal_page_last 931 _publ_section_title ; A high-temperature study of the thermal expansion and the anisotropy of the sodium atom in low albite T = 750 deg C Note: this sample of feldspar is from Tiburon, Marin County, California, USA ; _database_code_amcsd 0000596 _chemical_formula_sum 'Na Al Si3 O8' _cell_length_a 8.242 _cell_length_b 12.841 _cell_length_c 7.176 _cell_angle_alpha 93.7 _cell_angle_beta 116.3 _cell_angle_gamma 87.6 _cell_volume 679.366 _exptl_crystal_density_diffrn 2.564 _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 Na 0.27590 0.98820 0.14660 Al1o 0.00940 0.17270 0.21020 Si1m 0.00510 0.81980 0.23720 Si2o 0.69740 0.11240 0.32210 Si2m 0.68860 0.88260 0.36050 Oa1 0.00490 0.13590 0.97030 Oa2 0.60380 0.99930 0.28410 Obo 0.81400 0.11860 0.19670 Obm 0.82330 0.85200 0.25550 Oco 0.02030 0.30620 0.26960 Ocm 0.02750 0.69400 0.24130 Odo 0.20290 0.11190 0.39210 Odm 0.18080 0.86940 0.43010 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 Na 0.05088 0.14471 0.10184 -0.01151 0.02525 -0.05463 Al1o 0.02461 0.02162 0.01924 -0.00384 0.00962 0.00083 Si1m 0.02267 0.01996 0.01757 0.00336 0.00938 0.00209 Si2o 0.02074 0.01663 0.02279 -0.00192 0.00769 0.00083 Si2m 0.02046 0.01663 0.02363 0.00096 0.00866 0.00250 Oa1 0.05475 0.03992 0.02258 -0.00192 0.02068 0.00375 Oa2 0.02489 0.01747 0.03952 -0.00048 0.00818 0.00500 Obo 0.03761 0.04657 0.04726 -0.01295 0.02669 -0.00334 Obm 0.04258 0.05406 0.06420 0.01391 0.03727 0.00459 Oco 0.03401 0.02329 0.04830 -0.00815 0.01491 -0.00375 Ocm 0.03401 0.02246 0.04600 0.00719 0.01202 0.00417 Odo 0.04065 0.04158 0.02593 0.00623 0.00433 0.00542 Odm 0.04480 0.04408 0.02593 -0.00959 0.00096 -0.00334