data_KSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.82
_cell_length_b   3.92
_cell_length_c   6.75
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KSi
_chemical_formula_sum   'K4 Si4'
_cell_volume   259.75
_cell_formula_units_Z   4
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  0.73  0.94  0.1  1.0
  K  K1  1  0.18  0.98  0.73  1.0
  K  K2  1  0.64  0.94  0.02  1.0
  K  K3  1  0.09  0.98  0.64  1.0
  Si  Si4  1  0.19  0.94  0.75  1.0
  Si  Si5  1  0.72  0.98  0.13  1.0
  Si  Si6  1  0.1  0.94  0.62  1.0
  Si  Si7  1  0.63  0.98  0.99  1.0

data_KSi
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.92
_cell_length_b   6.75
_cell_length_c   9.82
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   KSi
_chemical_formula_sum   'K4 Si4'
_cell_volume   259.75
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  2  0.48  0.64  0.23  1.0
  K  K1  2  0.48  0.73  0.32  1.0
  Si  Si2  2  0.48  0.25  0.69  1.0
  Si  Si3  2  0.48  0.38  0.78  1.0

K K K K Si Si Si Si