data_PuCr3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.45
_cell_length_b   4.45
_cell_length_c   4.45
_cell_angle_alpha   128.29
_cell_angle_beta   128.29
_cell_angle_gamma   76.15
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PuCr3
_chemical_formula_sum   'Pu1 Cr3'
_cell_volume   52.59
_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
  Pu  Pu3  1  0.0  0.0  0.5  1.0
  Cr  Cr0  1  0.94  0.0  0.75  1.0
  Cr  Cr1  1  0.0  0.94  0.75  1.0
  Cr  Cr2  1  0.0  0.0  0.0  1.0

data_PuCr3
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.48
_cell_length_b   5.48
_cell_length_c   4.45
_cell_angle_alpha   90.0
_cell_angle_beta   128.07
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   PuCr3
_chemical_formula_sum   'Pu2 Cr6'
_cell_volume   105.18
_cell_formula_units_Z   2
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
  Pu  Pu0  2  0.0  0.5  0.5  1.0
  Cr  Cr1  4  0.22  0.03  0.19  1.0
  Cr  Cr2  2  0.0  0.0  0.0  1.0

Pu Cr Cr Cr
Pu Cr Cr Cr 0 1 - o o 0 2 o - o 1 2 + - o 1 3 + o + 2 3 o + + 