data_global _chemical_name_mineral 'Phlogopite' loop_ _publ_author_name 'Pabst A' _journal_name_full 'American Mineralogist' _journal_volume 40 _journal_year 1955 _journal_page_first 967 _journal_page_last 974 _publ_section_title ; Redescription of the single layer structure of the micas ; _database_code_amcsd 0000077 _chemical_formula_sum 'K Mg3 (Si3 Al) O12 H2' _cell_length_a 5.32 _cell_length_b 9.21 _cell_length_c 10.16 _cell_angle_alpha 90 _cell_angle_beta 100.03 _cell_angle_gamma 90 _cell_volume 490.203 _exptl_crystal_density_diffrn 2.827 _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 K 0.00000 0.50000 0.00000 1.00000 Mg1 0.00000 0.00000 0.50000 1.00000 Mg2 0.00000 0.33000 0.50000 1.00000 Si 0.57500 0.33000 0.22000 0.75000 Al 0.57500 0.33000 0.22000 0.25000 O1 0.05500 0.00000 0.16000 1.00000 O2 0.80500 0.25000 0.16000 1.00000 O3 0.63000 0.33000 0.38000 1.00000 O-H 0.63000 0.00000 0.38000 1.00000