The material described by SmMn2Ni3 crystallizes in the hexagonal P6/mmm space group. Sm(1) is bonded in a 18-coordinate geometry to six equivalent Mn(1) and twelve equivalent Ni(1) atoms. Mn(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Ni(1) atoms. Ni(1) is bonded to four equivalent Sm(1), four equivalent Mn(1), and four equivalent Ni(1) atoms to form a mixture of distorted corner, edge, and face-sharing NiSm4Mn4Ni4 cuboctahedra. is represented by the CIF file [CIF]
data_SmMn2Ni3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.054
_cell_length_b   5.054
_cell_length_c   3.996
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   88.402
_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
  Sm  Sm0  1  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.667  0.333  0.000  1.0
  Mn  Mn2  1  0.333  0.667  0.000  1.0
  Ni  Ni3  1  0.500  0.500  0.500  1.0
  Ni  Ni4  1  0.500  0.000  0.500  1.0
  Ni  Ni5  1  0.000  0.500  0.500  1.0
[/CIF]
.
The material described by SmMn2Ni3 crystallizes in the hexagonal P6/mmm space group. Sm(1) is bonded in a 18-coordinate geometry to six equivalent Mn(1) and twelve equivalent Ni(1) atoms. Mn(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Ni(1) atoms. Ni(1) is bonded to four equivalent Sm(1), four equivalent Mn(1), and four equivalent Ni(1) atoms to form a mixture of distorted corner, edge, and face-sharing NiSm4Mn4Ni4 cuboctahedra. is represented by the CIF file [CIF]
data_SmMn2Ni3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.054
_cell_length_b   5.054
_cell_length_c   3.996
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   88.402
_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
  Sm  Sm0  1  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.667  0.333  0.000  1.0
  Mn  Mn2  1  0.333  0.667  0.000  1.0
  Ni  Ni3  1  0.500  0.500  0.500  1.0
  Ni  Ni4  1  0.500  0.000  0.500  1.0
  Ni  Ni5  1  0.000  0.500  0.500  1.0
[/CIF]
.