data_global _chemical_name_mineral 'Osumilite' loop_ _publ_author_name 'Miyashiro A' _journal_name_full 'American Mineralogist' _journal_volume 41 _journal_year 1956 _journal_page_first 104 _journal_page_last 116 _publ_section_title ; Osumilite, a new silicate mineral, and its crystal structure ; _database_code_amcsd 78 _chemical_formula_sum 'K.32 Na.35 Ca.12 Mg1.48 Fe1.57 Al4.95 Si9 O30 H' _cell_length_a 10.17 _cell_length_b 10.17 _cell_length_c 14.34 _cell_angle_alpha 90.0 _cell_angle_beta 90.0 _cell_angle_gamma 120.0 _cell_volume 1284.463 _exptl_crystal_density_diffrn 2.628 _symmetry_space_group_name_H-M 'P 6/m c c' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-x+y,1/2+z' 'x,x-y,1/2-z' '-x+y,-x,-z' 'x-y,x,z' '-y,-x,1/2+z' 'y,x,1/2-z' 'y,-x+y,-z' '-y,x-y,z' 'x-y,-y,1/2+z' '-x+y,y,1/2-z' 'x,y,-z' '-x,-y,z' 'x,x-y,1/2+z' '-x,-x+y,1/2-z' 'x-y,x,-z' '-x+y,-x,z' 'y,x,1/2+z' '-y,-x,1/2-z' '-y,x-y,-z' 'y,-x+y,z' '-x+y,y,1/2+z' 'x-y,-y,1/2-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy K 0.0 0.0 0.25 0.32 Na 0.0 0.0 0.25 0.35 Ca 0.0 0.0 0.25 0.12 Mg 0.333333 0.666667 0.25 0.74 Fe1 0.333333 0.666667 0.25 0.26 Al 0.5 0.0 0.25 0.65 Fe2 0.5 0.0 0.25 0.35 Si 0.1 0.35 0.11 0.75 Al 0.1 0.35 0.11 0.25 O1 0.13 0.42 0.0 1.0 O2 0.21 0.29 0.12 1.0 O3 0.13 0.47 0.17 1.0 H2O 0.0 0.0 0.0 1.0