data_global
_amcsd_formula_title 'B3 K3 O6'
loop_
_publ_author_name
'Zachariasen W'
_journal_name_full 'Journal of Chemical Physics'
_journal_volume 5 
_journal_year 1937
_journal_page_first 919
_journal_page_last 922
_publ_section_title
;
 The Crystal Structure of Potassium Metaborate K3 (B3 O6)
 _cod_database_code 1010521
;
_database_code_amcsd 0017432
_chemical_formula_sum 'K B O2'
_cell_length_a 7.76
_cell_length_b 7.76
_cell_length_c 7.76
_cell_angle_alpha 110.6
_cell_angle_beta 110.6
_cell_angle_gamma 110.6
_cell_volume 343.866
_exptl_crystal_density_diffrn      2.373
_symmetry_space_group_name_H-M 'R -3 c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-x,1/2-z,1/2-y'
  '-z,-x,-y'
  '1/2+y,1/2+x,1/2+z'
  'y,z,x'
  '1/2-z,1/2-y,1/2-x'
  '-x,-y,-z'
  '1/2+x,1/2+z,1/2+y'
  'z,x,y'
  '1/2-y,1/2-x,1/2-z'
  '-y,-z,-x'
  '1/2+z,1/2+y,1/2+x'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
K1   0.68900  -0.18900   0.25000
B1   0.36100   0.13900   0.25000
O1   0.46500   0.03500   0.25000
O2   0.14600   0.35400   0.25000