data_MgNp
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.98
_cell_length_b   4.98
_cell_length_c   8.2
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgNp
_chemical_formula_sum   'Mg2 Np2'
_cell_volume   176.35
_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
  Mg  Mg0  1  0.49  0.44  0.1  1.0
  Mg  Mg1  1  0.0  0.88  0.0  1.0
  Np  Np2  1  0.49  0.44  0.17  1.0
  Np  Np3  1  0.0  0.88  0.07  1.0

data_MgNp
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.98
_cell_length_b   4.98
_cell_length_c   8.2
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgNp
_chemical_formula_sum   'Mg2 Np2'
_cell_volume   176.35
_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
  Mg  Mg0  1  0.0  0.88  0.0  1.0
  Mg  Mg1  1  0.49  0.44  0.1  1.0
  Np  Np2  1  0.0  0.88  0.07  1.0
  Np  Np3  1  0.49  0.44  0.17  1.0

Mg Mg Np Np
MgNp is alpha carbon monoxide-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of two MgNp clusters. Mg(1) is bonded in a single-bond geometry to one Np(1) atom. The Mg(1)-Np(1) bond length is 0.55 Å. Np(1) is bonded in a single-bond geometry to one Mg(1) atom.