data_TbNp
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.05
_cell_length_b   6.05
_cell_length_c   6.05
_cell_angle_alpha   31.9
_cell_angle_beta   31.9
_cell_angle_gamma   31.9
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TbNp
_chemical_formula_sum   'Tb1 Np1'
_cell_volume   54.88
_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
  Tb  Tb1  1  0.0  0.0  0.0  1.0
  Np  Np0  1  0.0  0.0  0.6  1.0

data_TbNp
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.76
_cell_length_b   3.32
_cell_length_c   6.05
_cell_angle_alpha   90.0
_cell_angle_beta   108.5
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TbNp
_chemical_formula_sum   'Tb2 Np2'
_cell_volume   109.76
_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
  Tb  Tb0  2  0.0  0.0  0.0  1.0
  Np  Np1  2  -0.0  0.0  0.4  1.0

Tb Np