The material structure described by Np3As4 crystallizes in the cubic I-43d space group. Np(1) is bonded to eight equivalent As(1) atoms to form a mixture of distorted edge, face, and corner-sharing NpAs8 hexagonal bipyramids. As(1) is bonded to six equivalent Np(1) atoms to form a mixture of distorted edge, face, and corner-sharing AsNp6 octahedra. The corner-sharing octahedral tilt angles range from 16-50°. is represented by the CIF card [CIF]
data_Np3As4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.437
_cell_length_b   7.437
_cell_length_c   7.437
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   316.684
_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  0.125  0.750  0.875  1.0
  Np  Np1  1  0.625  0.375  0.250  1.0
  Np  Np2  1  0.375  0.250  0.625  1.0
  Np  Np3  1  0.750  0.875  0.125  1.0
  Np  Np4  1  0.250  0.625  0.375  1.0
  Np  Np5  1  0.875  0.125  0.750  1.0
  As  As6  1  0.657  0.657  0.657  1.0
  As  As7  1  0.000  0.843  0.500  1.0
  As  As8  1  0.843  0.500  0.000  1.0
  As  As9  1  0.000  0.343  0.500  1.0
  As  As10  1  0.500  0.000  0.843  1.0
  As  As11  1  0.500  0.000  0.343  1.0
  As  As12  1  0.343  0.500  0.000  1.0
  As  As13  1  0.157  0.157  0.157  1.0
[/CIF]
.
The material structure described by Np3As4 crystallizes in the cubic I-43d space group. Np(1) is bonded to eight equivalent As(1) atoms to form a mixture of distorted edge, face, and corner-sharing NpAs8 hexagonal bipyramids. As(1) is bonded to six equivalent Np(1) atoms to form a mixture of distorted edge, face, and corner-sharing AsNp6 octahedra. The corner-sharing octahedral tilt angles range from 16-50°. is represented by the CIF card [CIF]
data_Np3As4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.437
_cell_length_b   7.437
_cell_length_c   7.437
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   316.684
_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  0.125  0.750  0.875  1.0
  Np  Np1  1  0.625  0.375  0.250  1.0
  Np  Np2  1  0.375  0.250  0.625  1.0
  Np  Np3  1  0.750  0.875  0.125  1.0
  Np  Np4  1  0.250  0.625  0.375  1.0
  Np  Np5  1  0.875  0.125  0.750  1.0
  As  As6  1  0.657  0.657  0.657  1.0
  As  As7  1  0.000  0.843  0.500  1.0
  As  As8  1  0.843  0.500  0.000  1.0
  As  As9  1  0.000  0.343  0.500  1.0
  As  As10  1  0.500  0.000  0.843  1.0
  As  As11  1  0.500  0.000  0.343  1.0
  As  As12  1  0.343  0.500  0.000  1.0
  As  As13  1  0.157  0.157  0.157  1.0
[/CIF]
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