data_global _chemical_name_mineral 'Walstromite' loop_ _publ_author_name 'Basciano L C' _journal_name_full 'Master's Thesis, University of British Columbia' _journal_volume 1999 _journal_year 1999 _journal_page_first 1 _journal_page_last 164 _publ_section_title ; Mineralogy and crystal structures of barium silicate minerals from Fresno County, California ; _database_code_amcsd 0014201 _chemical_compound_source 'Esquire #7, Big Creek, Fresno County, California, USA' _chemical_formula_sum 'Ba Ca2 Si3 O9' _cell_length_a 6.733 _cell_length_b 9.608 _cell_length_c 6.685 _cell_angle_alpha 69.64 _cell_angle_beta 102.29 _cell_angle_gamma 96.89 _cell_volume 395.650 _exptl_crystal_density_diffrn 3.741 _symmetry_space_group_name_H-M 'P -1' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Ba 0.04746 0.84872 0.32127 0.01620 Ca1 0.27510 0.50910 0.76280 0.01640 Ca2 0.43700 0.82820 0.94410 0.01550 Si1 0.23380 0.48110 0.28600 0.01380 Si2 0.44130 0.19610 0.51340 0.01380 Si3 0.09660 0.22160 0.15300 0.01380 O1 0.23010 0.12430 0.39310 0.01600 O2 0.35970 0.35600 0.50530 0.01660 O3 -0.10040 0.12180 0.10510 0.01640 O4 0.04520 0.37130 0.19970 0.01560 O5 -0.23270 0.74040 0.02960 0.01720 O6 0.49260 0.90890 0.24370 0.01780 O7 0.37340 0.55650 0.10730 0.01700 O8 0.13486 0.58620 0.36940 0.01970 O9 -0.61450 0.76630 0.63070 0.01750 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 Ba 0.01760 0.01590 0.01670 0.00260 0.00410 -0.00630 Ca1 0.01830 0.01750 0.01640 0.00130 0.00610 -0.00470 Ca2 0.01420 0.01890 0.01620 0.00130 0.00540 -0.00740 Si1 0.01420 0.01480 0.01450 0.00150 0.00650 -0.00470 Si2 0.01370 0.01580 0.01360 0.00070 0.00550 -0.00520 Si3 0.01200 0.01610 0.01500 0.00050 0.00570 -0.00550 O1 0.01480 0.01720 0.01610 -0.00070 0.00390 -0.00580 O2 0.01800 0.01770 0.01580 0.00160 0.00390 -0.00700 O3 0.01250 0.02020 0.01770 -0.00150 0.00420 -0.00780 O4 0.01200 0.01760 0.01930 -0.00060 0.00520 -0.00770 O5 0.01390 0.02060 0.01760 0.00180 0.00610 -0.00450 O6 0.02120 0.01680 0.01560 0.00220 0.00440 -0.00450 O7 0.01630 0.01960 0.01780 -0.00100 0.00950 -0.00630 O8 0.02300 0.02000 0.02150 0.00260 0.00990 -0.00940 O9 0.01820 0.01890 0.01700 0.00110 0.00810 -0.00530