data_global _amcsd_formula_title 'As6 Na10 Si2' loop_ _publ_author_name 'Eisenmann B' 'Klein J' 'Somer M' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 197 _journal_year 1991 _journal_page_first 267 _journal_page_last 268 _publ_section_title ; Crystal structure of decasodium di-mue-arsenidobis(diarsenidosilicate) _cod_database_code 1008462 ; _database_code_amcsd 0016366 _chemical_formula_sum 'Si As3 Na5' _cell_length_a 13.466 _cell_length_b 7.529 _cell_length_c 8.177 _cell_angle_alpha 90. _cell_angle_beta 90.5 _cell_angle_gamma 90. _cell_volume 828.998 _exptl_crystal_density_diffrn 2.947 _symmetry_space_group_name_H-M 'P 21/n' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Si1 0.08404 0.13985 0.42797 As1 0.22363 0.23354 0.57967 As2 0.07961 0.26064 0.15957 As3 0.93378 0.18240 0.58552 Na1 0.74061 0.15144 0.42421 Na2 0.41886 0.16464 0.42139 Na3 0.08879 0.01520 0.82525 Na4 0.08406 0.53100 0.66517 Na5 0.25843 0.99440 0.18601