data_global _chemical_name_mineral 'Dickite' loop_ _publ_author_name 'Bailey S W' _journal_name_full 'American Mineralogist' _journal_volume 48 _journal_year 1963 _journal_page_first 1196 _journal_page_last 1209 _publ_section_title ; Polymorphism of the kaolin minerals ; _database_code_amcsd 126 _chemical_formula_sum 'Si2 Al2 O9 H4' _cell_length_a 5.15 _cell_length_b 8.94 _cell_length_c 14.736 _cell_angle_alpha 90.0 _cell_angle_beta 103.58 _cell_angle_gamma 90.0 _cell_volume 659.492 _exptl_crystal_density_diffrn 2.6 _symmetry_space_group_name_H-M 'C 1 c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Si1 0.0288 0.3499 0.0405 Si2 0.54 0.1768 0.0402 Al1 0.3166 0.4966 0.232 Al2 0.8116 0.333 0.2306 O1 0.0385 0.5127 -0.0061 O2 0.7355 0.2776 -0.0058 O3 0.2412 0.2395 0.0058 O4 0.072 0.3624 0.1523 O5 0.6416 0.1687 0.1526 O-H1 0.5756 0.4742 0.1574 O-H2 0.0509 0.4767 0.2948 O-H3 0.5509 0.3551 0.2981 O-H4 0.9635 0.1668 0.2963