data_global _chemical_name_mineral 'Gillespite' loop_ _publ_author_name 'Pabst A' _journal_name_full 'American Mineralogist' _journal_volume 28 _journal_year 1943 _journal_page_first 372 _journal_page_last 390 _publ_section_title ; Crystal structure of gillespite, BaFeSi4O10 ; _database_code_amcsd 0000030 _chemical_formula_sum 'Ba Fe Si4 O10' _cell_length_a 7.495 _cell_length_b 7.495 _cell_length_c 16.050 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 901.609 _exptl_crystal_density_diffrn 3.429 _symmetry_space_group_name_H-M 'P 4/n c c' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-y,1/2-x,1/2+z' 'y,x,1/2-z' 'y,-x,-z' '1/2-y,1/2+x,z' 'x,-y,1/2+z' '1/2-x,1/2+y,1/2-z' '1/2+x,1/2+y,-z' '-x,-y,z' '1/2+y,1/2+x,1/2+z' '-y,-x,1/2-z' '-y,x,-z' '1/2+y,1/2-x,z' '-x,y,1/2+z' '1/2+x,1/2-y,1/2-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Ba 0.00000 0.00000 0.00000 Fe 0.00000 0.50000 0.09000 Si 0.27000 0.17500 0.15500 O1 0.21500 0.21500 0.25000 O2 0.46500 0.24000 0.14000 O3 0.13500 0.27500 0.09000