data_global _amcsd_formula_title 'Mg3Si4O10(OH)2*H2O' loop_ _publ_author_name 'Zanazzi P F' 'Comodi P' 'Nazzareni S' 'Rotiroti N' 'van Smaalen S' _journal_name_full 'Physics and Chemistry of Minerals' _journal_volume 34 _journal_year 2007 _journal_page_first 23 _journal_page_last 29 _publ_section_title ; Behavior of 10-A phase at low temperatures Sample: T = 116 K ; _database_code_amcsd 0009051 _chemical_formula_sum 'Si4 Mg3 O13 H4' _cell_length_a 5.3000 _cell_length_b 9.182 _cell_length_c 10.096 _cell_angle_alpha 90 _cell_angle_beta 100.05 _cell_angle_gamma 90 _cell_volume 483.779 _exptl_crystal_density_diffrn 2.727 _symmetry_space_group_name_H-M 'C 1 2/m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,z' '1/2+x,1/2-y,z' '-x,y,-z' '1/2-x,1/2+y,-z' '-x,-y,-z' '1/2-x,1/2-y,-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 Si 0.57530 0.16650 0.22840 1.00000 0.00300 Mg1 0.00000 0.50000 0.50000 1.00000 0.00500 Mg2 0.00000 0.83370 0.50000 1.00000 0.00500 O1 0.81050 0.24560 0.17190 1.00000 0.00700 O2 0.55370 0.00000 0.17360 1.00000 0.00900 O3 0.63010 0.16670 0.39170 1.00000 0.00600 O-H4 0.13100 0.00000 0.39220 1.00000 0.00400 Wat5 0.01400 0.00000 0.03100 0.50000 0.02500