data_CaNb3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.01
_cell_length_b   4.69
_cell_length_c   6.29
_cell_angle_alpha   90.0
_cell_angle_beta   99.77
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CaNb3
_chemical_formula_sum   'Ca1 Nb3'
_cell_volume   87.5
_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
  Ca  Ca0  1  0.0  0.0  0.0  1.0
  Nb  Nb1  1  1.0  0.34  0.27  1.0
  Nb  Nb2  1  0.97  0.0  0.1  1.0
  Nb  Nb3  1  0.95  0.34  0.93  1.0

data_CaNb3
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.01
_cell_length_b   4.69
_cell_length_c   6.29
_cell_angle_alpha   90.0
_cell_angle_beta   99.77
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CaNb3
_chemical_formula_sum   'Ca1 Nb3'
_cell_volume   87.5
_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
  Ca  Ca0  1  0.0  0.0  0.0  1.0
  Nb  Nb1  1  0.95  0.34  0.93  1.0
  Nb  Nb2  1  0.97  0.0  0.1  1.0
  Nb  Nb3  1  1.0  0.34  0.27  1.0

Ca Nb Nb Nb
Ca Nb Nb Nb 0 2 - o o 0 1 - o o 0 3 - o - 1 2 o o o 1 3 o o - 2 3 o o - 