data_global _amcsd_formula_title 'SrNa2P4O12(H2O)6' loop_ _publ_author_name 'Durif A' 'Averbuch-Pouchot M' 'Guitel J' _journal_name_full 'Acta Crystallographica, Section C' _journal_volume 39 _journal_year 1983 _journal_page_first 812 _journal_page_last 813 _publ_section_title ; Structure of Disodium Strontium Tetrametaphosphate Hexahydrate, SrNa2P4O12(H2O)6 _cod_database_code 1007206 ; _database_code_amcsd 0009976 _chemical_formula_sum 'Sr P4 Na2 O18' _cell_length_a 7.332 _cell_length_b 7.663 _cell_length_c 14.408 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 809.515 _exptl_crystal_density_diffrn 2.238 _symmetry_space_group_name_H-M 'I 2 m m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' 'x,y,-z' '1/2+x,1/2+y,1/2-z' 'x,-y,z' '1/2+x,1/2-y,1/2+z' 'x,-y,-z' '1/2+x,1/2-y,1/2-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Sr1 0.00000 0.00000 0.50000 P1 0.84940 0.19530 0.10311 Na1 0.11750 0.00000 0.26360 O1 0.00720 0.21960 0.16690 O2 0.18710 0.19070 0.38950 O3 0.43260 0.29620 0.50000 O4 0.27220 0.50000 0.60780 O5 0.33210 0.20490 0.00000 O6 0.27890 0.50000 0.14690 O7 0.39240 0.00000 0.17900