The structure described by Sm(Mn2Ni)4 crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded in a 20-coordinate geometry to eight equivalent Mn(1), eight equivalent Mn(2), and four equivalent Ni(1) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent Sm(1), two equivalent Mn(1), four equivalent Mn(2), and four equivalent Ni(1) atoms to form a mixture of distorted edge, corner, and face-sharing MnSm2Mn6Ni4 cuboctahedra. In the second Mn site, Mn(2) is bonded in a 12-coordinate geometry to two equivalent Sm(1), two equivalent Mn(2), four equivalent Mn(1), and four equivalent Ni(1) atoms. Ni(1) is bonded in a 10-coordinate geometry to one Sm(1), four equivalent Mn(1), four equivalent Mn(2), and one Ni(1) atom. is represented by the CIF card [CIF]
data_Sm(Mn2Ni)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.836
_cell_length_b   6.452
_cell_length_c   6.452
_cell_angle_alpha   81.926
_cell_angle_beta   67.991
_cell_angle_gamma   67.991
_symmetry_Int_Tables_number   1
_cell_volume   173.041
_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  0.000  0.000  0.500  1.0
  Mn  Mn2  1  0.500  0.000  0.500  1.0
  Mn  Mn3  1  0.500  0.500  0.000  1.0
  Mn  Mn4  1  0.000  0.500  0.000  1.0
  Mn  Mn5  1  0.500  0.761  0.239  1.0
  Mn  Mn6  1  0.500  0.239  0.761  1.0
  Mn  Mn7  1  0.739  0.761  0.761  1.0
  Mn  Mn8  1  0.261  0.239  0.239  1.0
  Ni  Ni9  1  0.000  0.349  0.651  1.0
  Ni  Ni10  1  0.000  0.651  0.349  1.0
  Ni  Ni11  1  0.651  0.349  0.349  1.0
  Ni  Ni12  1  0.349  0.651  0.651  1.0
[/CIF]
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The structure described by Sm(Mn2Ni)4 crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded in a 20-coordinate geometry to eight equivalent Mn(1), eight equivalent Mn(2), and four equivalent Ni(1) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent Sm(1), two equivalent Mn(1), four equivalent Mn(2), and four equivalent Ni(1) atoms to form a mixture of distorted edge, corner, and face-sharing MnSm2Mn6Ni4 cuboctahedra. In the second Mn site, Mn(2) is bonded in a 12-coordinate geometry to two equivalent Sm(1), two equivalent Mn(2), four equivalent Mn(1), and four equivalent Ni(1) atoms. Ni(1) is bonded in a 10-coordinate geometry to one Sm(1), four equivalent Mn(1), four equivalent Mn(2), and one Ni(1) atom. is represented by the CIF card [CIF]
data_Sm(Mn2Ni)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.836
_cell_length_b   6.452
_cell_length_c   6.452
_cell_angle_alpha   81.926
_cell_angle_beta   67.991
_cell_angle_gamma   67.991
_symmetry_Int_Tables_number   1
_cell_volume   173.041
_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  0.000  0.000  0.500  1.0
  Mn  Mn2  1  0.500  0.000  0.500  1.0
  Mn  Mn3  1  0.500  0.500  0.000  1.0
  Mn  Mn4  1  0.000  0.500  0.000  1.0
  Mn  Mn5  1  0.500  0.761  0.239  1.0
  Mn  Mn6  1  0.500  0.239  0.761  1.0
  Mn  Mn7  1  0.739  0.761  0.761  1.0
  Mn  Mn8  1  0.261  0.239  0.239  1.0
  Ni  Ni9  1  0.000  0.349  0.651  1.0
  Ni  Ni10  1  0.000  0.651  0.349  1.0
  Ni  Ni11  1  0.651  0.349  0.349  1.0
  Ni  Ni12  1  0.349  0.651  0.651  1.0
[/CIF]
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