The compound described by Np5Ge4 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Np sites. In the first Np site, Np(1) is bonded in a 8-coordinate geometry to two equivalent Np(1) and six equivalent Ge(1) atoms. In the second Np site, Np(2) is bonded in a 7-coordinate geometry to two equivalent Ge(2) and five equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a 8-coordinate geometry to six equivalent Np(2) and two equivalent Ge(2) atoms. In the second Ge site, Ge(1) is bonded in a 9-coordinate geometry to four equivalent Np(1) and five equivalent Np(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Np5Ge4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.430
_cell_length_b   8.430
_cell_length_c   5.687
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   349.991
_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  0.333  0.667  0.000  1.0
  Np  Np1  1  0.667  0.333  0.500  1.0
  Np  Np2  1  0.667  0.333  0.000  1.0
  Np  Np3  1  0.333  0.667  0.500  1.0
  Np  Np4  1  0.300  0.000  0.250  1.0
  Np  Np5  1  0.300  0.300  0.750  1.0
  Np  Np6  1  0.000  0.700  0.750  1.0
  Np  Np7  1  0.000  0.300  0.250  1.0
  Np  Np8  1  0.700  0.700  0.250  1.0
  Np  Np9  1  0.700  0.000  0.750  1.0
  Ge  Ge10  1  0.634  0.000  0.250  1.0
  Ge  Ge11  1  0.634  0.634  0.750  1.0
  Ge  Ge12  1  0.000  0.366  0.750  1.0
  Ge  Ge13  1  0.000  0.634  0.250  1.0
  Ge  Ge14  1  0.366  0.366  0.250  1.0
  Ge  Ge15  1  0.366  0.000  0.750  1.0
  Ge  Ge16  1  0.000  0.000  0.000  1.0
  Ge  Ge17  1  0.000  0.000  0.500  1.0
[/CIF]
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The compound described by Np5Ge4 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Np sites. In the first Np site, Np(1) is bonded in a 8-coordinate geometry to two equivalent Np(1) and six equivalent Ge(1) atoms. In the second Np site, Np(2) is bonded in a 7-coordinate geometry to two equivalent Ge(2) and five equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a 8-coordinate geometry to six equivalent Np(2) and two equivalent Ge(2) atoms. In the second Ge site, Ge(1) is bonded in a 9-coordinate geometry to four equivalent Np(1) and five equivalent Np(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Np5Ge4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.430
_cell_length_b   8.430
_cell_length_c   5.687
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   349.991
_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  0.333  0.667  0.000  1.0
  Np  Np1  1  0.667  0.333  0.500  1.0
  Np  Np2  1  0.667  0.333  0.000  1.0
  Np  Np3  1  0.333  0.667  0.500  1.0
  Np  Np4  1  0.300  0.000  0.250  1.0
  Np  Np5  1  0.300  0.300  0.750  1.0
  Np  Np6  1  0.000  0.700  0.750  1.0
  Np  Np7  1  0.000  0.300  0.250  1.0
  Np  Np8  1  0.700  0.700  0.250  1.0
  Np  Np9  1  0.700  0.000  0.750  1.0
  Ge  Ge10  1  0.634  0.000  0.250  1.0
  Ge  Ge11  1  0.634  0.634  0.750  1.0
  Ge  Ge12  1  0.000  0.366  0.750  1.0
  Ge  Ge13  1  0.000  0.634  0.250  1.0
  Ge  Ge14  1  0.366  0.366  0.250  1.0
  Ge  Ge15  1  0.366  0.000  0.750  1.0
  Ge  Ge16  1  0.000  0.000  0.000  1.0
  Ge  Ge17  1  0.000  0.000  0.500  1.0
[/CIF]
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