data_global _chemical_name_mineral 'Wollastonite' loop_ _publ_author_name 'Ohashi Y' _journal_name_full 'Physics and Chemistry of Minerals' _journal_volume 10 _journal_year 1984 _journal_page_first 217 _journal_page_last 229 _publ_section_title ; Polysynthetically-twinned structures of enstatite and wollastonite Sample: WO2M ; _database_code_amcsd 0007360 _chemical_formula_sum 'Ca Si O3' _cell_length_a 15.424 _cell_length_b 7.324 _cell_length_c 7.0692 _cell_angle_alpha 90 _cell_angle_beta 95.371 _cell_angle_gamma 90 _cell_volume 795.069 _exptl_crystal_density_diffrn 2.911 _symmetry_space_group_name_H-M 'P 1 21/a 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,z' '1/2-x,1/2+y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z CaM1 0.40056 0.62480 0.73890 CaM2 0.39880 0.11910 0.73620 CaM3 0.24837 0.37440 0.97360 Si1 0.40750 0.65840 0.23110 Si2 0.40770 0.09270 0.23110 Si3 0.30140 0.37610 0.44380 OA1 0.34850 0.61210 0.03660 OA2 0.34930 0.13290 0.03690 OA3 0.21470 0.37120 0.30110 OB1 0.50830 0.61570 0.23350 OB2 0.50900 0.12180 0.23670 OB3 0.29910 0.37030 0.67080 OC1 0.39140 0.87610 0.27530 OC2 0.36390 0.19700 0.40530 OC3 0.36370 0.55500 0.40560