data_global _chemical_name_mineral 'Albite' loop_ _publ_author_name 'Harlow G E' 'Brown G E' _journal_name_full 'American Mineralogist' _journal_volume 65 _journal_year 1980 _journal_page_first 986 _journal_page_last 995 _publ_section_title ; Low albite: An X-Ray and neutron diffraction study Sample: X-ray split Na site Note: this sample of feldspar is from Amelia, Virginia ; _database_code_amcsd 0000798 _chemical_formula_sum 'Al.502 Si1.497 Na O4' _cell_length_a 8.142 _cell_length_b 12.785 _cell_length_c 7.159 _cell_angle_alpha 94.19 _cell_angle_beta 116.61 _cell_angle_gamma 87.68 _cell_volume 664.477 _exptl_crystal_density_diffrn 2.851 _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 Al1o 0.00878 0.16864 0.20805 0.97000 Si1o 0.00878 0.16864 0.20805 0.03000 Si1m 0.00382 0.82064 0.23734 0.96500 Al1m 0.00382 0.82064 0.23734 0.03500 Si2o 0.69210 0.11040 0.31507 1.00000 Si2m 0.68175 0.88189 0.36071 1.00000 Na2 0.27033 0.97800 0.16219 1.00000 Na3 0.26617 0.00103 0.12793 1.00000 Oa1 0.00481 0.12120 0.96610 1.00000 Oa2 0.59166 0.99766 0.27967 1.00000 Obo 0.81285 0.11039 0.19124 1.00000 Obm 0.82061 0.85121 0.25942 1.00000 Oco 0.01348 0.30276 0.27023 1.00000 Ocm 0.02402 0.69390 0.22938 1.00000 Odo 0.20765 0.10922 0.38898 1.00000 Odm 0.18316 0.86825 0.43555 1.00000 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 Al1o 0.00894 0.00577 0.00544 -0.00094 0.00302 0.00008 Si1o 0.00894 0.00577 0.00544 -0.00094 0.00302 0.00008 Si1m 0.00744 0.00461 0.00453 0.00099 0.00269 0.00054 Al1m 0.00744 0.00461 0.00453 0.00099 0.00269 0.00054 Si2o 0.00660 0.00379 0.00633 -0.00009 0.00212 0.00000 Si2m 0.00671 0.00404 0.00658 0.00052 0.00273 0.00062 Oa1 0.01922 0.00997 0.00689 0.00127 0.00697 0.00095 Oa2 0.00902 0.00568 0.01210 -0.00019 0.00299 0.00116 Obo 0.01391 0.01202 0.01629 -0.00315 0.00957 -0.00128 Obm 0.01592 0.01433 0.02173 0.00456 0.01251 0.00116 Oco 0.01404 0.00675 0.01367 -0.00118 0.00511 -0.00111 Ocm 0.01302 0.00675 0.01389 0.00226 0.00302 0.00058 Odo 0.01514 0.01194 0.00833 0.00310 0.00130 0.00194 Odm 0.01702 0.01252 0.00901 -0.00188 -0.00005 -0.00107