The crystal structure described by NpAl2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. Np(1) is bonded in a 16-coordinate geometry to four equivalent Np(1) and twelve equivalent Al(1) atoms. Al(1) is bonded to six equivalent Np(1) and six equivalent Al(1) atoms to form a mixture of edge, face, and corner-sharing AlNp6Al6 cuboctahedra. is represented by the CIF file [CIF]
data_NpAl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.570
_cell_length_b   5.570
_cell_length_c   5.570
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   122.191
_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
  Np  Np0  1  0.875  0.875  0.875  1.0
  Np  Np1  1  0.125  0.125  0.125  1.0
  Al  Al2  1  0.500  0.500  0.500  1.0
  Al  Al3  1  0.500  0.500  0.000  1.0
  Al  Al4  1  0.000  0.500  0.500  1.0
  Al  Al5  1  0.500  0.000  0.500  1.0
[/CIF]
.
The crystal structure described by NpAl2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. Np(1) is bonded in a 16-coordinate geometry to four equivalent Np(1) and twelve equivalent Al(1) atoms. Al(1) is bonded to six equivalent Np(1) and six equivalent Al(1) atoms to form a mixture of edge, face, and corner-sharing AlNp6Al6 cuboctahedra. is represented by the CIF file [CIF]
data_NpAl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.570
_cell_length_b   5.570
_cell_length_c   5.570
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   122.191
_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
  Np  Np0  1  0.875  0.875  0.875  1.0
  Np  Np1  1  0.125  0.125  0.125  1.0
  Al  Al2  1  0.500  0.500  0.500  1.0
  Al  Al3  1  0.500  0.500  0.000  1.0
  Al  Al4  1  0.000  0.500  0.500  1.0
  Al  Al5  1  0.500  0.000  0.500  1.0
[/CIF]
.