data_global _chemical_name_mineral 'Calcio-olivine' loop_ _publ_author_name 'Udagawa S' 'Urabe K' 'Natsume M' 'Yano T' _journal_name_full 'Cement and Concrete Research' _journal_volume 10 _journal_year 1980 _journal_page_first 139 _journal_page_last 144 _publ_section_title ; Refinement of the crystal structure of gamma-Ca2SiO4 ; _database_code_amcsd 0017745 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Ca2 Si O4' _cell_length_a 5.081 _cell_length_b 11.224 _cell_length_c 6.778 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 386.544 _exptl_crystal_density_diffrn 2.960 _symmetry_space_group_name_H-M 'P b n m' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,y,1/2-z' '-x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-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 Cal 0.00000 0.00000 0.00000 Ca2 -0.00990 0.28090 0.25000 Si 0.42750 0.09660 0.25000 O1 -0.25430 0.09370 0.25000 O2 0.29740 -0.03840 0.25000 O3 0.29850 0.16240 0.05750 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 Cal 0.00706 0.01085 0.00372 -0.00116 -0.00052 -0.00154 Ca2 0.00772 0.00702 0.00465 0.00087 0.00000 0.00000 Si 0.00392 0.00766 0.00396 0.00578 0.00000 0.00000 O1 0.00654 0.01213 0.00791 -0.00289 0.00000 0.00000 O2 0.00850 0.00638 0.00954 0.00116 0.00000 0.00000 O3 0.00798 0.01021 0.00535 0.00087 -0.00140 0.00039