The crystal structure described by MgSm2Ni2 crystallizes in the tetragonal P4/mbm space group. Mg(1) is bonded to eight equivalent Sm(1) and four equivalent Ni(1) atoms to form a mixture of distorted corner and face-sharing MgSm8Ni4 cuboctahedra. Sm(1) is bonded in a 6-coordinate geometry to four equivalent Mg(1) and six equivalent Ni(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Mg(1), six equivalent Sm(1), and one Ni(1) atom. is represented by the CIF file [CIF]
data_Sm2MgNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.439
_cell_length_b   7.439
_cell_length_c   3.783
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.984
_symmetry_Int_Tables_number   1
_cell_volume   209.385
_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
  Sm  Sm0  1  0.674  0.174  0.500  1.0
  Sm  Sm1  1  0.326  0.826  0.500  1.0
  Sm  Sm2  1  0.174  0.326  0.500  1.0
  Sm  Sm3  1  0.826  0.674  0.500  1.0
  Mg  Mg4  1  0.000  0.000  0.000  1.0
  Mg  Mg5  1  0.500  0.500  0.000  1.0
  Ni  Ni6  1  0.117  0.617  0.000  1.0
  Ni  Ni7  1  0.883  0.383  0.000  1.0
  Ni  Ni8  1  0.617  0.883  0.000  1.0
  Ni  Ni9  1  0.383  0.117  0.000  1.0
[/CIF]
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The crystal structure described by MgSm2Ni2 crystallizes in the tetragonal P4/mbm space group. Mg(1) is bonded to eight equivalent Sm(1) and four equivalent Ni(1) atoms to form a mixture of distorted corner and face-sharing MgSm8Ni4 cuboctahedra. Sm(1) is bonded in a 6-coordinate geometry to four equivalent Mg(1) and six equivalent Ni(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Mg(1), six equivalent Sm(1), and one Ni(1) atom. is represented by the CIF file [CIF]
data_Sm2MgNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.439
_cell_length_b   7.439
_cell_length_c   3.783
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   89.984
_symmetry_Int_Tables_number   1
_cell_volume   209.385
_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
  Sm  Sm0  1  0.674  0.174  0.500  1.0
  Sm  Sm1  1  0.326  0.826  0.500  1.0
  Sm  Sm2  1  0.174  0.326  0.500  1.0
  Sm  Sm3  1  0.826  0.674  0.500  1.0
  Mg  Mg4  1  0.000  0.000  0.000  1.0
  Mg  Mg5  1  0.500  0.500  0.000  1.0
  Ni  Ni6  1  0.117  0.617  0.000  1.0
  Ni  Ni7  1  0.883  0.383  0.000  1.0
  Ni  Ni8  1  0.617  0.883  0.000  1.0
  Ni  Ni9  1  0.383  0.117  0.000  1.0
[/CIF]
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