data_NpPa3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.85
_cell_length_b   5.85
_cell_length_c   5.85
_cell_angle_alpha   135.56
_cell_angle_beta   135.56
_cell_angle_gamma   64.67
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NpPa3
_chemical_formula_sum   'Np1 Pa3'
_cell_volume   96.6
_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
  Np  Np0  1  0.0  0.0  0.94  1.0
  Pa  Pa1  1  0.21  0.0  0.47  1.0
  Pa  Pa2  1  0.0  0.21  0.47  1.0
  Pa  Pa3  1  0.0  0.0  0.0  1.0

data_NpPa3
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.25
_cell_length_b   6.25
_cell_length_c   5.85
_cell_angle_alpha   90.0
_cell_angle_beta   122.33
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NpPa3
_chemical_formula_sum   'Np2 Pa6'
_cell_volume   193.2
_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
  Np  Np0  2  0.0  0.0  0.94  1.0
  Pa  Pa1  4  0.39  0.39  0.26  1.0
  Pa  Pa2  2  0.0  0.0  0.0  1.0

Np Pa Pa Pa
NpPa(Pa)2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two NpPa clusters and two Pa clusters. In each NpPa cluster, Np(1) is bonded in a single-bond geometry to one Pa(2) atom. The Np(1)-Pa(2) bond length is 0.35 Å. Pa(2) is bonded in a single-bond geometry to one Np(1) atom. In each Pa cluster, Pa(1) is bonded in a 1-coordinate geometry to one Pa(1) atom. The Pa(1)-Pa(1) bond length is 1.32 Å.