The material structure described by Sm2Ni2Al crystallizes in the orthorhombic Immm space group. Sm(1) is bonded in a 10-coordinate geometry to six equivalent Ni(1) and four equivalent Al(1) atoms. Ni(1) is bonded in a 10-coordinate geometry to six equivalent Sm(1), two equivalent Ni(1), and two equivalent Al(1) atoms. Al(1) is bonded to eight equivalent Sm(1) and four equivalent Ni(1) atoms to form a mixture of distorted edge and face-sharing AlSm8Ni4 cuboctahedra. is represented by the CIF file [CIF]
data_Sm2AlNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.232
_cell_length_b   5.414
_cell_length_c   5.447
_cell_angle_alpha   119.798
_cell_angle_beta   112.836
_cell_angle_gamma   90.001
_symmetry_Int_Tables_number   1
_cell_volume   96.848
_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  0.798  0.298  0.596  1.0
  Sm  Sm1  1  0.202  0.702  0.404  1.0
  Al  Al2  1  0.000  1.000  0.000  1.0
  Ni  Ni3  1  0.500  0.261  1.000  1.0
  Ni  Ni4  1  0.500  0.739  0.000  1.0
[/CIF]
.
The material structure described by Sm2Ni2Al crystallizes in the orthorhombic Immm space group. Sm(1) is bonded in a 10-coordinate geometry to six equivalent Ni(1) and four equivalent Al(1) atoms. Ni(1) is bonded in a 10-coordinate geometry to six equivalent Sm(1), two equivalent Ni(1), and two equivalent Al(1) atoms. Al(1) is bonded to eight equivalent Sm(1) and four equivalent Ni(1) atoms to form a mixture of distorted edge and face-sharing AlSm8Ni4 cuboctahedra. is represented by the CIF file [CIF]
data_Sm2AlNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.232
_cell_length_b   5.414
_cell_length_c   5.447
_cell_angle_alpha   119.798
_cell_angle_beta   112.836
_cell_angle_gamma   90.001
_symmetry_Int_Tables_number   1
_cell_volume   96.848
_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  0.798  0.298  0.596  1.0
  Sm  Sm1  1  0.202  0.702  0.404  1.0
  Al  Al2  1  0.000  1.000  0.000  1.0
  Ni  Ni3  1  0.500  0.261  1.000  1.0
  Ni  Ni4  1  0.500  0.739  0.000  1.0
[/CIF]
.