data_DyNp
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.26
_cell_length_b   3.26
_cell_length_c   5.09
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   DyNp
_chemical_formula_sum   'Dy1 Np1'
_cell_volume   54.09
_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
  Dy  Dy0  1  0.0  0.0  0.0  1.0
  Np  Np1  1  0.63  0.63  0.54  1.0

data_DyNp
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.61
_cell_length_b   4.61
_cell_length_c   5.09
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   DyNp
_chemical_formula_sum   'Dy2 Np2'
_cell_volume   108.19
_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
  Dy  Dy0  2  0.0  0.0  0.0  1.0
  Np  Np1  2  0.13  0.5  0.54  1.0

Dy Np
Dy Np 0 1 - - - 0 1 - - o 0 1 - o - 0 1 - o o 0 1 o - - 0 1 o - o 0 1 o o - 0 0 + o o 0 0 o + o 1 1 + o o 1 1 o + o 
NpDy is Tetraauricupride structured and crystallizes in the monoclinic Cm space group. Np(1) is bonded in a 12-coordinate geometry to four equivalent Np(1) and eight equivalent Dy(1) atoms. All Np(1)-Np(1) bond lengths are 3.26 Å. There are a spread of Np(1)-Dy(1) bond distances ranging from 2.88-4.01 Å. Dy(1) is bonded in a 12-coordinate geometry to eight equivalent Np(1) and four equivalent Dy(1) atoms. All Dy(1)-Dy(1) bond lengths are 3.26 Å.