data_global _chemical_name_mineral 'Santite' loop_ _publ_author_name 'Zachariasen W H' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 98 _journal_year 1937 _journal_page_first 266 _journal_page_last 274 _publ_section_title ; The crystal structure of potassium acid dihydronium pentaborate KH2(H3O)2B5O10, (potassium pentaborate tetrahydrate) ; _database_code_amcsd 0010569 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'K B5 O12' _cell_length_a 11.08 _cell_length_b 11.14 _cell_length_c 8.97 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1107.178 _exptl_crystal_density_diffrn 1.711 _symmetry_space_group_name_H-M 'A b a 2' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2+y,1/2+z' '1/2+x,1/2-y,z' '1/2+x,-y,1/2+z' '1/2-x,1/2+y,z' '1/2-x,+y,1/2+z' '-x,-y,z' '-x,1/2-y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z K 0.00000 0.00000 0.00000 B1 0.00000 0.00000 0.38890 B2 0.19440 0.09720 0.31940 B3 0.19440 -0.06940 0.50000 O1 0.07640 0.08330 0.29170 O2 0.07640 -0.08330 0.48610 O3 0.22220 -0.13890 0.08330 O4 0.25000 0.02080 0.41670 O5 0.25000 0.18060 0.25000 O6 0.00000 0.16670 0.75000