data_global _chemical_name_mineral 'Sudoite' loop_ _publ_author_name 'Eggleton R A' 'Bailey S W' _journal_name_full 'American Mineralogist' _journal_volume 52 _journal_year 1967 _journal_page_first 673 _journal_page_last 689 _publ_section_title ; Structural aspects of dioctahedral chlorite ; _database_code_amcsd 155 _chemical_formula_sum 'Si3.32 Al3.37 Mg2.31 O18 H8' _cell_length_a 5.237 _cell_length_b 9.07 _cell_length_c 14.285 _cell_angle_alpha 90.0 _cell_angle_beta 97.03 _cell_angle_gamma 90.0 _cell_volume 673.431 _exptl_crystal_density_diffrn 2.645 _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 Si 0.2312 0.1667 0.1909 0.83 Al 0.2312 0.1667 0.1909 0.17 Al2 0.0 0.333333 0.0 1.0 Mg3 0.0 0.1667 0.5 0.77 Al3 0.0 0.1667 0.5 0.23 Mg4 0.0 0.5 0.5 0.77 Al4 0.0 0.5 0.5 0.23 O1 0.19 0.1667 0.072 1.0 O2 0.1943 0.0 0.2368 1.0 O3 0.5066 0.2335 0.2332 1.0 O-H1 0.19 0.5 0.072 1.0 O-H2 0.1421 0.0 0.4243 1.0 O-H3 0.1421 0.333333 0.4243 1.0