data_global _chemical_name_mineral 'Reinhardbraunsite' loop_ _publ_author_name 'Kuznetsova T P' 'Nevskii N N' 'Ilyukhin V V' 'Belov N V' _journal_name_full 'Soviet Physics Crystallography' _journal_volume 25 _journal_year 1980 _journal_page_first 91 _journal_page_last 92 _publ_section_title ; Refinement of the crystal structure of calcium chondrodite Ca5[SiO4]2(OH)2=Ca(OH)2*2Ca2SiO4 ; _database_code_amcsd 0015581 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Ca5 Si2 O10 H2' _cell_length_a 8.9207 _cell_length_b 11.4481 _cell_length_c 5.0759 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 108.32 _cell_volume 492.103 _exptl_crystal_density_diffrn 2.825 _symmetry_space_group_name_H-M 'P 1 1 21/b' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2+y,1/2-z' '-x,1/2-y,1/2+z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Ca1 0.00000 0.00000 0.00000 Ca2 0.18750 0.33010 0.00040 Ca3 0.41850 0.11950 -0.01000 Si1 0.20060 0.14520 0.42590 O1 0.20650 0.01560 0.29460 O2 0.04420 0.16990 0.29610 O3 0.35340 0.25240 0.29840 O4 0.19960 0.14640 0.74500 O-H5 0.40060 0.44220 0.74480 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 Ca1 0.00552 0.00670 0.00467 0.00051 -0.00311 -0.00157 Ca2 0.00552 0.00521 0.00718 0.00429 -0.00115 0.00148 Ca3 0.00549 0.00730 0.00710 0.00485 0.00268 0.00008 Si1 0.00389 0.00539 0.00277 0.00345 0.00017 0.00045 O1 0.00894 0.00694 0.00752 0.00681 -0.00063 -0.00042 O2 0.00603 0.00880 0.00919 0.00760 0.00000 0.00215 O3 0.00538 0.00682 0.01017 0.00149 0.00166 0.00089 O4 0.00865 0.00945 0.00590 0.00499 0.00052 0.00190 O-H5 0.01333 0.02286 0.04294 0.05852 0.08972 0.04555