The compound described by Y3(NiSi)2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to two equivalent Ni(1) and five equivalent Si(1) atoms. In the second Y site, Y(2) is bonded to eight equivalent Ni(1) and four equivalent Si(1) atoms to form a mixture of edge and face-sharing YSi4Ni8 cuboctahedra. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Y(1), four equivalent Y(2), one Ni(1), and two equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to two equivalent Y(2), five equivalent Y(1), and two equivalent Ni(1) atoms. is represented by the CIF file [CIF]
data_Y3(SiNi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.970
_cell_length_b   8.970
_cell_length_c   8.970
_cell_angle_alpha   153.854
_cell_angle_beta   153.452
_cell_angle_gamma   37.606
_symmetry_Int_Tables_number   1
_cell_volume   141.945
_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
  Y  Y0  1  0.181  0.681  0.500  1.0
  Y  Y1  1  0.819  0.319  0.500  1.0
  Y  Y2  1  0.000  0.000  0.000  1.0
  Si  Si3  1  0.362  0.862  0.500  1.0
  Si  Si4  1  0.638  0.138  0.500  1.0
  Ni  Ni5  1  0.430  0.430  0.000  1.0
  Ni  Ni6  1  0.570  0.570  0.000  1.0
[/CIF]
.
The compound described by Y3(NiSi)2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to two equivalent Ni(1) and five equivalent Si(1) atoms. In the second Y site, Y(2) is bonded to eight equivalent Ni(1) and four equivalent Si(1) atoms to form a mixture of edge and face-sharing YSi4Ni8 cuboctahedra. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Y(1), four equivalent Y(2), one Ni(1), and two equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to two equivalent Y(2), five equivalent Y(1), and two equivalent Ni(1) atoms. is represented by the CIF file [CIF]
data_Y3(SiNi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.970
_cell_length_b   8.970
_cell_length_c   8.970
_cell_angle_alpha   153.854
_cell_angle_beta   153.452
_cell_angle_gamma   37.606
_symmetry_Int_Tables_number   1
_cell_volume   141.945
_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
  Y  Y0  1  0.181  0.681  0.500  1.0
  Y  Y1  1  0.819  0.319  0.500  1.0
  Y  Y2  1  0.000  0.000  0.000  1.0
  Si  Si3  1  0.362  0.862  0.500  1.0
  Si  Si4  1  0.638  0.138  0.500  1.0
  Ni  Ni5  1  0.430  0.430  0.000  1.0
  Ni  Ni6  1  0.570  0.570  0.000  1.0
[/CIF]
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