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 = 970 deg C Note: this sample of feldspar is from Tiburon, Marin County, California, USA ; _database_code_amcsd 0000597 _chemical_formula_sum 'Na Al Si3 O8' _cell_length_a 8.277 _cell_length_b 12.860 _cell_length_c 7.181 _cell_angle_alpha 93.3 _cell_angle_beta 116.2 _cell_angle_gamma 87.6 _cell_volume 684.577 _exptl_crystal_density_diffrn 2.544 _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 0.27820 0.98830 0.14680 Al1o 0.00980 0.17470 0.21130 Si1m 0.00580 0.82000 0.23700 Si2o 0.69970 0.11350 0.32520 Si2m 0.69110 0.88300 0.35960 Oa1 0.00450 0.13710 0.97170 Oa2 0.60780 0.00010 0.28410 Obo 0.81550 0.12230 0.20120 Obm 0.82520 0.85310 0.25490 Oco 0.02250 0.30800 0.26790 Ocm 0.02980 0.69470 0.24660 Odo 0.20140 0.11360 0.39340 Odm 0.17950 0.87060 0.42800 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 0.06592 0.16946 0.12847 -0.00966 0.03317 -0.05191 Al1o 0.03100 0.02671 0.02372 -0.00483 0.01211 0.00084 Si1m 0.02821 0.02504 0.02141 0.00386 0.01138 0.00209 Si2o 0.02570 0.02087 0.02855 -0.00241 0.00969 0.00084 Si2m 0.02542 0.02087 0.02918 0.00097 0.01065 0.00251 Oa1 0.06760 0.05092 0.02792 -0.00097 0.02567 0.00460 Oa2 0.03268 0.02087 0.04828 -0.00097 0.01041 0.00502 Obo 0.04581 0.06094 0.05920 -0.01642 0.03317 -0.00209 Obm 0.04972 0.06762 0.07536 0.01497 0.04238 0.00377 Oco 0.04218 0.03005 0.05983 -0.00917 0.01792 -0.00293 Ocm 0.04246 0.02755 0.06088 0.01014 0.01792 0.00753 Odo 0.04888 0.05092 0.03191 0.00724 0.00557 0.00670 Odm 0.05307 0.05676 0.03212 -0.01111 0.00145 -0.00293