data_global
_amcsd_formula_title 'KNb3O8'
loop_
_publ_author_name
'Gasperin M'
_journal_name_full 'Acta Crystallographica, Section B'
_journal_volume 38 
_journal_year 1982
_journal_page_first 2024
_journal_page_last 2026
_publ_section_title
;
 Structure du Triniobate(V) de Potassium KNb3O8, un Niobate Lamellaire
 _cod_database_code 1001208
;
_database_code_amcsd 0009776
_chemical_formula_sum 'Nb3 K O8'
_cell_length_a 8.903
_cell_length_b 21.16
_cell_length_c 3.799
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 715.684
_exptl_crystal_density_diffrn      4.138
_symmetry_space_group_name_H-M 'A m a m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  '1/2+x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  'x,y,-z'
  'x,1/2+y,1/2-z'
  '-x,-y,z'
  '-x,1/2-y,1/2+z'
  '1/2-x,y,z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,-y,-z'
  '1/2+x,1/2-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
Nb1   0.94030   0.36820   0.00000
Nb2   0.25000   0.24160   0.00000
K1   0.25000   0.98450   0.00000
O1   0.40800   0.15650   0.00000
O2   0.06540   0.43110   0.00000
O3   0.09510   0.29540   0.00000
O4   0.25000   0.71340   0.00000
O5   0.25000   0.58510   0.00000