The structure described by Cr3Ni2Si crystallizes in the cubic Fd-3m space group. Cr(1) is bonded in a distorted linear geometry to four equivalent Ni(1) and two equivalent Si(1) atoms. Ni(1) is bonded to six equivalent Cr(1), three equivalent Ni(1), and three equivalent Si(1) atoms to form distorted NiCr6Si3Ni3 cuboctahedra that share corners with three equivalent Si(1)Cr6Ni6 cuboctahedra, corners with six equivalent Ni(1)Cr6Si3Ni3 cuboctahedra, faces with four equivalent Si(1)Cr6Ni6 cuboctahedra, and faces with nine equivalent Ni(1)Cr6Si3Ni3 cuboctahedra. Si(1) is bonded to six equivalent Cr(1) and six equivalent Ni(1) atoms to form SiCr6Ni6 cuboctahedra that share corners with six equivalent Ni(1)Cr6Si3Ni3 cuboctahedra, faces with six equivalent Si(1)Cr6Ni6 cuboctahedra, and faces with eight equivalent Ni(1)Cr6Si3Ni3 cuboctahedra. is represented by the CIF file [CIF]
data_Cr3SiNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.338
_cell_length_b   7.338
_cell_length_c   7.338
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   279.379
_cell_formula_units_Z   4
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
  Cr  Cr0  1  0.922  0.922  0.578  1.0
  Cr  Cr1  1  0.672  0.328  0.328  1.0
  Cr  Cr2  1  0.328  0.672  0.672  1.0
  Cr  Cr3  1  0.672  0.672  0.328  1.0
  Cr  Cr4  1  0.672  0.328  0.672  1.0
  Cr  Cr5  1  0.328  0.672  0.328  1.0
  Cr  Cr6  1  0.578  0.922  0.578  1.0
  Cr  Cr7  1  0.578  0.922  0.922  1.0
  Cr  Cr8  1  0.922  0.578  0.578  1.0
  Cr  Cr9  1  0.922  0.578  0.922  1.0
  Cr  Cr10  1  0.328  0.328  0.672  1.0
  Cr  Cr11  1  0.578  0.578  0.922  1.0
  Si  Si12  1  0.125  0.625  0.125  1.0
  Si  Si13  1  0.125  0.125  0.625  1.0
  Si  Si14  1  0.625  0.125  0.125  1.0
  Si  Si15  1  0.125  0.125  0.125  1.0
  Ni  Ni16  1  0.915  0.255  0.915  1.0
  Ni  Ni17  1  0.335  0.335  0.995  1.0
  Ni  Ni18  1  0.995  0.335  0.335  1.0
  Ni  Ni19  1  0.335  0.335  0.335  1.0
  Ni  Ni20  1  0.255  0.915  0.915  1.0
  Ni  Ni21  1  0.915  0.915  0.915  1.0
  Ni  Ni22  1  0.915  0.915  0.255  1.0
  Ni  Ni23  1  0.335  0.995  0.335  1.0
[/CIF]
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The structure described by Cr3Ni2Si crystallizes in the cubic Fd-3m space group. Cr(1) is bonded in a distorted linear geometry to four equivalent Ni(1) and two equivalent Si(1) atoms. Ni(1) is bonded to six equivalent Cr(1), three equivalent Ni(1), and three equivalent Si(1) atoms to form distorted NiCr6Si3Ni3 cuboctahedra that share corners with three equivalent Si(1)Cr6Ni6 cuboctahedra, corners with six equivalent Ni(1)Cr6Si3Ni3 cuboctahedra, faces with four equivalent Si(1)Cr6Ni6 cuboctahedra, and faces with nine equivalent Ni(1)Cr6Si3Ni3 cuboctahedra. Si(1) is bonded to six equivalent Cr(1) and six equivalent Ni(1) atoms to form SiCr6Ni6 cuboctahedra that share corners with six equivalent Ni(1)Cr6Si3Ni3 cuboctahedra, faces with six equivalent Si(1)Cr6Ni6 cuboctahedra, and faces with eight equivalent Ni(1)Cr6Si3Ni3 cuboctahedra. is represented by the CIF file [CIF]
data_Cr3SiNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.338
_cell_length_b   7.338
_cell_length_c   7.338
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   279.379
_cell_formula_units_Z   4
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
  Cr  Cr0  1  0.922  0.922  0.578  1.0
  Cr  Cr1  1  0.672  0.328  0.328  1.0
  Cr  Cr2  1  0.328  0.672  0.672  1.0
  Cr  Cr3  1  0.672  0.672  0.328  1.0
  Cr  Cr4  1  0.672  0.328  0.672  1.0
  Cr  Cr5  1  0.328  0.672  0.328  1.0
  Cr  Cr6  1  0.578  0.922  0.578  1.0
  Cr  Cr7  1  0.578  0.922  0.922  1.0
  Cr  Cr8  1  0.922  0.578  0.578  1.0
  Cr  Cr9  1  0.922  0.578  0.922  1.0
  Cr  Cr10  1  0.328  0.328  0.672  1.0
  Cr  Cr11  1  0.578  0.578  0.922  1.0
  Si  Si12  1  0.125  0.625  0.125  1.0
  Si  Si13  1  0.125  0.125  0.625  1.0
  Si  Si14  1  0.625  0.125  0.125  1.0
  Si  Si15  1  0.125  0.125  0.125  1.0
  Ni  Ni16  1  0.915  0.255  0.915  1.0
  Ni  Ni17  1  0.335  0.335  0.995  1.0
  Ni  Ni18  1  0.995  0.335  0.335  1.0
  Ni  Ni19  1  0.335  0.335  0.335  1.0
  Ni  Ni20  1  0.255  0.915  0.915  1.0
  Ni  Ni21  1  0.915  0.915  0.915  1.0
  Ni  Ni22  1  0.915  0.915  0.255  1.0
  Ni  Ni23  1  0.335  0.995  0.335  1.0
[/CIF]
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