data_K2YNb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.92
_cell_length_b   9.92
_cell_length_c   4.89
_cell_angle_alpha   101.31
_cell_angle_beta   101.31
_cell_angle_gamma   19.91
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2YNb
_chemical_formula_sum   'K2 Y1 Nb1'
_cell_volume   160.45
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  K  K0  1  0.98  0.0  0.55  1.0
  K  K1  1  0.57  0.0  0.24  1.0
  Y  Y3  1  0.0  0.0  0.0  1.0
  Nb  Nb2  1  0.28  0.0  0.4  1.0

data_K2YNb
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.43
_cell_length_b   4.89
_cell_length_c   9.92
_cell_angle_alpha   101.31
_cell_angle_beta   99.96
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2YNb
_chemical_formula_sum   'K2 Y1 Nb1'
_cell_volume   160.45
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  K  K0  1  0.0  0.24  0.57  1.0
  K  K1  1  0.0  0.55  0.98  1.0
  Y  Y2  1  0.0  0.0  0.0  1.0
  Nb  Nb3  1  0.0  0.4  0.28  1.0

K K Y Nb