The structure described by Sm3(Ni3Si)2 crystallizes in the cubic Im-3m space group. Sm(1) is bonded in a 12-coordinate geometry to eight equivalent Ni(1) and four equivalent Si(1) atoms. Ni(1) is bonded in a 10-coordinate geometry to four equivalent Sm(1), four equivalent Ni(1), and two equivalent Si(1) atoms. Si(1) is bonded to six equivalent Sm(1) and six equivalent Ni(1) atoms to form a mixture of face and corner-sharing SiSm6Ni6 cuboctahedra. is represented by the CIF file [CIF]
data_Sm3(SiNi3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.679
_cell_length_b   7.679
_cell_length_c   7.679
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   348.595
_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  0.715  0.715  0.000  1.0
  Sm  Sm1  1  0.285  0.000  0.285  1.0
  Sm  Sm2  1  0.000  0.285  0.285  1.0
  Sm  Sm3  1  0.285  0.285  0.000  1.0
  Sm  Sm4  1  0.715  0.000  0.715  1.0
  Sm  Sm5  1  0.000  0.715  0.715  1.0
  Si  Si6  1  0.000  0.000  0.500  1.0
  Si  Si7  1  0.000  0.500  0.000  1.0
  Si  Si8  1  0.500  0.000  0.000  1.0
  Si  Si9  1  0.500  0.500  0.500  1.0
  Ni  Ni10  1  0.331  0.331  0.662  1.0
  Ni  Ni11  1  0.669  0.000  0.331  1.0
  Ni  Ni12  1  0.000  0.669  0.331  1.0
  Ni  Ni13  1  0.669  0.331  0.000  1.0
  Ni  Ni14  1  0.331  0.662  0.331  1.0
  Ni  Ni15  1  0.000  0.331  0.669  1.0
  Ni  Ni16  1  0.331  0.669  0.000  1.0
  Ni  Ni17  1  0.331  0.000  0.669  1.0
  Ni  Ni18  1  0.662  0.331  0.331  1.0
  Ni  Ni19  1  0.669  0.669  0.338  1.0
  Ni  Ni20  1  0.669  0.338  0.669  1.0
  Ni  Ni21  1  0.338  0.669  0.669  1.0
[/CIF]
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The structure described by Sm3(Ni3Si)2 crystallizes in the cubic Im-3m space group. Sm(1) is bonded in a 12-coordinate geometry to eight equivalent Ni(1) and four equivalent Si(1) atoms. Ni(1) is bonded in a 10-coordinate geometry to four equivalent Sm(1), four equivalent Ni(1), and two equivalent Si(1) atoms. Si(1) is bonded to six equivalent Sm(1) and six equivalent Ni(1) atoms to form a mixture of face and corner-sharing SiSm6Ni6 cuboctahedra. is represented by the CIF file [CIF]
data_Sm3(SiNi3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.679
_cell_length_b   7.679
_cell_length_c   7.679
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   348.595
_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  0.715  0.715  0.000  1.0
  Sm  Sm1  1  0.285  0.000  0.285  1.0
  Sm  Sm2  1  0.000  0.285  0.285  1.0
  Sm  Sm3  1  0.285  0.285  0.000  1.0
  Sm  Sm4  1  0.715  0.000  0.715  1.0
  Sm  Sm5  1  0.000  0.715  0.715  1.0
  Si  Si6  1  0.000  0.000  0.500  1.0
  Si  Si7  1  0.000  0.500  0.000  1.0
  Si  Si8  1  0.500  0.000  0.000  1.0
  Si  Si9  1  0.500  0.500  0.500  1.0
  Ni  Ni10  1  0.331  0.331  0.662  1.0
  Ni  Ni11  1  0.669  0.000  0.331  1.0
  Ni  Ni12  1  0.000  0.669  0.331  1.0
  Ni  Ni13  1  0.669  0.331  0.000  1.0
  Ni  Ni14  1  0.331  0.662  0.331  1.0
  Ni  Ni15  1  0.000  0.331  0.669  1.0
  Ni  Ni16  1  0.331  0.669  0.000  1.0
  Ni  Ni17  1  0.331  0.000  0.669  1.0
  Ni  Ni18  1  0.662  0.331  0.331  1.0
  Ni  Ni19  1  0.669  0.669  0.338  1.0
  Ni  Ni20  1  0.669  0.338  0.669  1.0
  Ni  Ni21  1  0.338  0.669  0.669  1.0
[/CIF]
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