data_global _chemical_name_mineral 'Vishnevite' loop_ _publ_author_name 'Hassan I' 'Grundy H D' _journal_name_full 'The Canadian Mineralogist' _journal_volume 22 _journal_year 1984 _journal_page_first 333 _journal_page_last 349 _publ_section_title ; The character of the cancrinite-vishnevite solid-solution series ; _database_code_amcsd 0005197 _chemical_formula_sum 'O14.67 Si3 Al3 S.24 Na3.25 K.51 Ca.06' _cell_length_a 12.685 _cell_length_b 12.685 _cell_length_c 5.179 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 721.701 _exptl_crystal_density_diffrn 2.322 _symmetry_space_group_name_H-M 'P 63' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x-y,x,1/2+z' '-y,x-y,z' '-x,-y,1/2+z' '-x+y,-x,z' 'y,-x+y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy _atom_site_U_iso_or_equiv O1 0.20170 0.40490 0.66980 1.00000 ? O2 0.11750 0.55270 0.72780 1.00000 ? O3 0.04060 0.35990 0.03930 1.00000 ? O4 0.32550 0.35220 0.05610 1.00000 ? SiT1 0.33800 0.41370 0.75060 1.00000 ? AlT2 0.08310 0.41240 0.75000 1.00000 ? O51 0.06150 0.11330 0.67250 0.24000 0.03460 O52 0.04960 0.10900 0.95410 0.24000 0.06370 S 0.00000 0.00000 0.29180 0.24000 0.04890 O7 0.00000 0.00000 0.07370 0.24000 0.04540 O6 0.61840 0.30430 0.68930 0.33000 0.05640 Na1 0.66667 0.33333 0.12720 1.00000 ? Na2 0.13190 0.26110 0.28850 0.75000 ? K2 0.13190 0.26110 0.28850 0.17000 ? Ca2 0.13190 0.26110 0.28850 0.02000 ? 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 O1 0.01290 0.02470 0.01670 0.01230 0.00190 0.00270 O2 0.02270 0.01330 0.03140 0.01060 0.00300 0.00130 O3 0.01410 0.02590 0.01040 0.00850 0.00370 0.00430 O4 0.02210 0.02650 0.00930 0.01710 -0.00010 0.00330 SiT1 0.00890 0.01020 0.00810 0.00570 0.00040 0.00110 AlT2 0.00770 0.01040 0.00810 0.00480 0.00040 0.00110 O51 0.03560 0.00000 0.00000 0.00000 0.00000 0.00000 O52 0.06370 0.00000 0.00000 0.00000 0.00000 0.00000 S 0.04890 0.00000 0.00000 0.00000 0.00000 0.00000 O7 0.04540 0.00000 0.00000 0.00000 0.00000 0.00000 O6 0.05980 0.08180 0.02780 0.03540 0.00510 0.00580 Na1 0.02530 0.02530 0.05660 0.01270 0.00000 0.00000 Na2 0.04720 0.13260 0.03050 0.06780 -0.00700 -0.01330 K2 0.04720 0.13260 0.03050 0.06780 -0.00700 -0.01330 Ca2 0.04720 0.13260 0.03050 0.06780 -0.00700 -0.01330