The structure described by Np(NiSi)2 crystallizes in the tetragonal I4/mmm space group. Np(1) is bonded in a 16-coordinate geometry to eight equivalent Ni(1) and eight equivalent Si(1) atoms. Ni(1) is bonded in a 12-coordinate geometry to four equivalent Np(1), four equivalent Ni(1), and four equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to four equivalent Np(1), four equivalent Ni(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_Np(SiNi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.625
_cell_length_b   5.625
_cell_length_c   5.625
_cell_angle_alpha   139.139
_cell_angle_beta   139.139
_cell_angle_gamma   59.163
_symmetry_Int_Tables_number   1
_cell_volume   75.426
_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  0.000  0.000  0.000  1.0
  Si  Si1  1  0.376  0.376  0.000  1.0
  Si  Si2  1  0.624  0.624  0.000  1.0
  Ni  Ni3  1  0.250  0.750  0.500  1.0
  Ni  Ni4  1  0.750  0.250  0.500  1.0
[/CIF]
.
The structure described by Np(NiSi)2 crystallizes in the tetragonal I4/mmm space group. Np(1) is bonded in a 16-coordinate geometry to eight equivalent Ni(1) and eight equivalent Si(1) atoms. Ni(1) is bonded in a 12-coordinate geometry to four equivalent Np(1), four equivalent Ni(1), and four equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to four equivalent Np(1), four equivalent Ni(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_Np(SiNi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.625
_cell_length_b   5.625
_cell_length_c   5.625
_cell_angle_alpha   139.139
_cell_angle_beta   139.139
_cell_angle_gamma   59.163
_symmetry_Int_Tables_number   1
_cell_volume   75.426
_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  0.000  0.000  0.000  1.0
  Si  Si1  1  0.376  0.376  0.000  1.0
  Si  Si2  1  0.624  0.624  0.000  1.0
  Ni  Ni3  1  0.250  0.750  0.500  1.0
  Ni  Ni4  1  0.750  0.250  0.500  1.0
[/CIF]
.