data_global _chemical_name_mineral 'Albite' loop_ _publ_author_name 'Downs R T' 'Hazen R M' 'Finger L W' _journal_name_full 'American Mineralogist' _journal_volume 79 _journal_year 1994 _journal_page_first 1042 _journal_page_last 1052 _publ_section_title ; The high-pressure crystal chemistry of low albite and the origin of the pressure dependency of Al-Si ordering P = .44 GPa Note: sample is from Crete ; _database_code_amcsd 0001684 _chemical_formula_sum 'Na Al Si3 O8' _cell_length_a 8.1104 _cell_length_b 12.7710 _cell_length_c 7.1482 _cell_angle_alpha 94.244 _cell_angle_beta 116.667 _cell_angle_gamma 87.835 _cell_volume 659.817 _exptl_crystal_density_diffrn 2.640 _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_U_iso_or_equiv Na 0.26599 0.98965 0.14111 0.04559 Al1o 0.00858 0.16812 0.20865 0.00836 Si1m 0.00323 0.82043 0.23643 0.00823 Si2o 0.69147 0.10994 0.31592 0.00735 Si2m 0.68095 0.88179 0.36323 0.00735 O(A1) 0.00670 0.13148 0.96887 0.01393 O(A2) 0.58962 0.99733 0.27941 0.00912 O(B)o 0.81192 0.10913 0.19144 0.01254 O(B)m 0.81884 0.85101 0.25649 0.01494 O(C)o 0.01066 0.30145 0.26979 0.01089 O(C)m 0.02441 0.69402 0.23316 0.01292 O(D)o 0.20318 0.10854 0.37768 0.01583 O(D)m 0.17678 0.86682 0.42281 0.01798 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 0.01700 0.05169 0.06382 -0.00683 0.01854 -0.02801