data_global _chemical_name_mineral 'Jeremejevite' loop_ _publ_author_name 'Rodellas C' 'Garcia-Blanco S' 'Vegas A' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 165 _journal_year 1983 _journal_page_first 255 _journal_page_last 260 _publ_section_title ; Crystal structure refinement of jeremejevite (Al6B5F3O15) ; _database_code_amcsd 0010860 _chemical_compound_source 'Cape Cross, Namibia' _chemical_formula_sum 'Al6 B5 F3 O15' _cell_length_a 8.556 _cell_length_b 8.556 _cell_length_c 8.175 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 518.275 _exptl_crystal_density_diffrn 3.287 _symmetry_space_group_name_H-M 'P 63/m' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x+y,-x,1/2-z' 'x-y,x,1/2+z' 'y,-x+y,-z' '-y,x-y,z' 'x,y,1/2-z' '-x,-y,1/2+z' 'x-y,x,-z' '-x+y,-x,z' '-y,x-y,1/2-z' 'y,-x+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_U_iso_or_equiv Al 0.35261 0.01544 0.07532 0.00380 B1 0.23322 0.00232 0.75000 0.00480 B2 0.66667 0.33333 -0.05402 0.00470 F 0.50014 0.11314 0.25000 0.00560 O1 0.28512 0.19661 0.10135 0.00460 O2 0.56079 0.15000 -0.05455 0.00450 O3 0.30286 0.18636 0.75000 0.00500