data_ZrTa
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.11
_cell_length_b   4.11
_cell_length_c   4.91
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZrTa
_chemical_formula_sum   'Zr2 Ta2'
_cell_volume   82.93
_cell_formula_units_Z   2
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
  Zr  Zr2  1  0.05  0.0  0.28  1.0
  Zr  Zr3  1  0.0  0.05  0.64  1.0
  Ta  Ta0  1  0.05  0.05  0.0  1.0
  Ta  Ta1  1  0.0  0.0  0.0  1.0

data_ZrTa
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.81
_cell_length_b   5.81
_cell_length_c   4.91
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   ZrTa
_chemical_formula_sum   'Zr4 Ta4'
_cell_volume   165.86
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Zr  Zr0  2  0.0  0.0  0.64  1.0
  Zr  Zr1  2  0.05  0.0  0.28  1.0
  Ta  Ta2  4  0.03  0.03  0.0  1.0

Zr Zr Ta Ta
Zr Zr Ta Ta 0 3 o o o 0 2 o o o 0 1 o o o 1 3 o o + 1 2 o o + 2 3 o o o 