data_global _amcsd_formula_title 'NaAlGe3O8' loop_ _publ_author_name 'Fleet M E' _journal_name_full 'American Mineralogist' _journal_volume 76 _journal_year 1991 _journal_page_first 92 _journal_page_last 99 _publ_section_title ; Structures of low gallium albite (NaGaSi3O8) and intermediate germanium albite (NaAlGe3O8): Tetrahedral-site ordering in sodium feldspar ; _database_code_amcsd 0001342 _chemical_compound_source 'Synthetic' _chemical_formula_sum '(Ge3 Al) Na O8' _cell_length_a 8.419 _cell_length_b 13.298 _cell_length_c 7.354 _cell_angle_alpha 94.49 _cell_angle_beta 116.25 _cell_angle_gamma 90.88 _cell_volume 734.999 _exptl_crystal_density_diffrn 3.577 _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 Ge1o 0.01066 0.15782 0.21137 0.72600 Al1o 0.01066 0.15782 0.21137 0.27400 Ge1m 0.00205 0.81213 0.22968 0.62500 Al1m 0.00205 0.81213 0.22968 0.37500 Ge2o 0.68829 0.10494 0.31238 0.81500 Al2o 0.68829 0.10494 0.31238 0.18500 Ge2m 0.67675 0.87440 0.35631 0.83400 Al2m 0.67675 0.87440 0.35631 0.16600 Na 0.27320 0.01870 0.12118 1.00000 OA1 0.01050 0.12810 0.97830 1.00000 OA2 0.57580 0.98650 0.27130 1.00000 OBo 0.82020 0.09200 0.18390 1.00000 OBm 0.80800 0.83630 0.24430 1.00000 OCo 0.00330 0.28370 0.28750 1.00000 OCm 0.01520 0.68220 0.19710 1.00000 ODo 0.20420 0.10580 0.37950 1.00000 ODm 0.19140 0.86450 0.43230 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 Ge1o 0.01014 0.00808 0.00860 -0.00101 0.00456 0.00026 Al1o 0.01014 0.00808 0.00860 -0.00101 0.00456 0.00026 Ge1m 0.01065 0.00896 0.00836 0.00268 0.00394 0.00075 Al1m 0.01065 0.00896 0.00836 0.00268 0.00394 0.00075 Ge2o 0.00875 0.00612 0.01254 0.00000 0.00394 0.00053 Al2o 0.00875 0.00612 0.01254 0.00000 0.00394 0.00053 Ge2m 0.00988 0.00746 0.01216 0.00101 0.00419 0.00163 Al2m 0.00988 0.00746 0.01216 0.00101 0.00419 0.00163 Na 0.02064 0.15631 0.08511 0.02229 -0.00647 -0.09193 OA1 0.03294 0.01385 0.01177 0.00344 0.01204 0.00229 OA2 0.00913 0.00541 0.01874 0.00015 0.00278 0.00405 OBo 0.01900 0.01536 0.03331 -0.00849 0.01836 -0.00850 OBm 0.02076 0.03550 0.04204 0.00784 0.02229 0.00277 OCo 0.01659 0.00834 0.02444 -0.00278 0.01076 0.00154 OCm 0.01736 0.00976 0.01913 0.00480 0.00050 -0.00088 ODo 0.01811 0.01811 0.01304 0.00607 0.00115 0.00141 ODm 0.02419 0.02423 0.01684 -0.00445 -0.00291 -0.00128