The structure described by NpPm3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Np(1) is bonded to twelve equivalent Pm(1) atoms to form NpPm12 cuboctahedra that share corners with six equivalent Np(1)Pm12 cuboctahedra, corners with twelve equivalent Pm(1)Pm8Np4 cuboctahedra, edges with eighteen equivalent Pm(1)Pm8Np4 cuboctahedra, faces with eight equivalent Np(1)Pm12 cuboctahedra, and faces with twelve equivalent Pm(1)Pm8Np4 cuboctahedra. Pm(1) is bonded to four equivalent Np(1) and eight equivalent Pm(1) atoms to form PmPm8Np4 cuboctahedra that share corners with four equivalent Np(1)Pm12 cuboctahedra, corners with fourteen equivalent Pm(1)Pm8Np4 cuboctahedra, edges with six equivalent Np(1)Pm12 cuboctahedra, edges with twelve equivalent Pm(1)Pm8Np4 cuboctahedra, faces with four equivalent Np(1)Pm12 cuboctahedra, and faces with sixteen equivalent Pm(1)Pm8Np4 cuboctahedra. is represented by the CIF file [CIF]
data_Pm3Np
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.167
_cell_length_b   7.167
_cell_length_c   5.740
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   255.333
_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
  Pm  Pm0  1  0.831  0.169  0.750  1.0
  Pm  Pm1  1  0.338  0.169  0.750  1.0
  Pm  Pm2  1  0.831  0.662  0.750  1.0
  Pm  Pm3  1  0.169  0.831  0.250  1.0
  Pm  Pm4  1  0.662  0.831  0.250  1.0
  Pm  Pm5  1  0.169  0.338  0.250  1.0
  Np  Np6  1  0.667  0.333  0.250  1.0
  Np  Np7  1  0.333  0.667  0.750  1.0
[/CIF]
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The structure described by NpPm3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Np(1) is bonded to twelve equivalent Pm(1) atoms to form NpPm12 cuboctahedra that share corners with six equivalent Np(1)Pm12 cuboctahedra, corners with twelve equivalent Pm(1)Pm8Np4 cuboctahedra, edges with eighteen equivalent Pm(1)Pm8Np4 cuboctahedra, faces with eight equivalent Np(1)Pm12 cuboctahedra, and faces with twelve equivalent Pm(1)Pm8Np4 cuboctahedra. Pm(1) is bonded to four equivalent Np(1) and eight equivalent Pm(1) atoms to form PmPm8Np4 cuboctahedra that share corners with four equivalent Np(1)Pm12 cuboctahedra, corners with fourteen equivalent Pm(1)Pm8Np4 cuboctahedra, edges with six equivalent Np(1)Pm12 cuboctahedra, edges with twelve equivalent Pm(1)Pm8Np4 cuboctahedra, faces with four equivalent Np(1)Pm12 cuboctahedra, and faces with sixteen equivalent Pm(1)Pm8Np4 cuboctahedra. is represented by the CIF file [CIF]
data_Pm3Np
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.167
_cell_length_b   7.167
_cell_length_c   5.740
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   255.333
_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
  Pm  Pm0  1  0.831  0.169  0.750  1.0
  Pm  Pm1  1  0.338  0.169  0.750  1.0
  Pm  Pm2  1  0.831  0.662  0.750  1.0
  Pm  Pm3  1  0.169  0.831  0.250  1.0
  Pm  Pm4  1  0.662  0.831  0.250  1.0
  Pm  Pm5  1  0.169  0.338  0.250  1.0
  Np  Np6  1  0.667  0.333  0.250  1.0
  Np  Np7  1  0.333  0.667  0.750  1.0
[/CIF]
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