The crystal structure described by NiMn crystallizes in the trigonal R-3m space group. Mn(1) is bonded to six equivalent Mn(1) and six equivalent Ni(1) atoms to form MnMn6Ni6 cuboctahedra that share corners with twelve equivalent Mn(1)Mn6Ni6 cuboctahedra, edges with twelve equivalent Mn(1)Mn6Ni6 cuboctahedra, edges with twelve equivalent Ni(1)Mn6Ni6 cuboctahedra, faces with six equivalent Mn(1)Mn6Ni6 cuboctahedra, and faces with twelve equivalent Ni(1)Mn6Ni6 cuboctahedra. Ni(1) is bonded to six equivalent Mn(1) and six equivalent Ni(1) atoms to form NiMn6Ni6 cuboctahedra that share corners with twelve equivalent Ni(1)Mn6Ni6 cuboctahedra, edges with twelve equivalent Mn(1)Mn6Ni6 cuboctahedra, edges with twelve equivalent Ni(1)Mn6Ni6 cuboctahedra, faces with six equivalent Ni(1)Mn6Ni6 cuboctahedra, and faces with twelve equivalent Mn(1)Mn6Ni6 cuboctahedra. is represented by the CIF file [CIF]
data_MnNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.348
_cell_length_b   4.348
_cell_length_c   4.348
_cell_angle_alpha   33.095
_cell_angle_beta   33.095
_cell_angle_gamma   33.095
_symmetry_Int_Tables_number   1
_cell_volume   21.818
_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
  Mn  Mn0  1  0.000  0.000  0.000  1.0
  Ni  Ni1  1  0.500  0.500  0.500  1.0
[/CIF]
.
The crystal structure described by NiMn crystallizes in the trigonal R-3m space group. Mn(1) is bonded to six equivalent Mn(1) and six equivalent Ni(1) atoms to form MnMn6Ni6 cuboctahedra that share corners with twelve equivalent Mn(1)Mn6Ni6 cuboctahedra, edges with twelve equivalent Mn(1)Mn6Ni6 cuboctahedra, edges with twelve equivalent Ni(1)Mn6Ni6 cuboctahedra, faces with six equivalent Mn(1)Mn6Ni6 cuboctahedra, and faces with twelve equivalent Ni(1)Mn6Ni6 cuboctahedra. Ni(1) is bonded to six equivalent Mn(1) and six equivalent Ni(1) atoms to form NiMn6Ni6 cuboctahedra that share corners with twelve equivalent Ni(1)Mn6Ni6 cuboctahedra, edges with twelve equivalent Mn(1)Mn6Ni6 cuboctahedra, edges with twelve equivalent Ni(1)Mn6Ni6 cuboctahedra, faces with six equivalent Ni(1)Mn6Ni6 cuboctahedra, and faces with twelve equivalent Mn(1)Mn6Ni6 cuboctahedra. is represented by the CIF file [CIF]
data_MnNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.348
_cell_length_b   4.348
_cell_length_c   4.348
_cell_angle_alpha   33.095
_cell_angle_beta   33.095
_cell_angle_gamma   33.095
_symmetry_Int_Tables_number   1
_cell_volume   21.818
_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
  Mn  Mn0  1  0.000  0.000  0.000  1.0
  Ni  Ni1  1  0.500  0.500  0.500  1.0
[/CIF]
.