The material described by CaNi2Si crystallizes in the hexagonal P6_3/mmc space group. Ca(1) is bonded in a 8-coordinate geometry to eight equivalent Ni(1) and six equivalent Si(1) atoms. Ni(1) is bonded in a 10-coordinate geometry to four equivalent Ca(1), three equivalent Ni(1), and three equivalent Si(1) atoms. Si(1) is bonded to six equivalent Ca(1) and six equivalent Ni(1) atoms to form a mixture of distorted corner and face-sharing SiCa6Ni6 cuboctahedra. is represented by the CIF file [CIF]
data_CaSiNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.951
_cell_length_b   3.951
_cell_length_c   9.908
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   133.921
_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
  Ca  Ca0  1  0.667  0.333  0.750  1.0
  Ca  Ca1  1  0.333  0.667  0.250  1.0
  Si  Si2  1  0.000  0.000  0.500  1.0
  Si  Si3  1  0.000  0.000  0.000  1.0
  Ni  Ni4  1  0.667  0.333  0.461  1.0
  Ni  Ni5  1  0.333  0.667  0.539  1.0
  Ni  Ni6  1  0.333  0.667  0.961  1.0
  Ni  Ni7  1  0.667  0.333  0.039  1.0
[/CIF]
.
The material described by CaNi2Si crystallizes in the hexagonal P6_3/mmc space group. Ca(1) is bonded in a 8-coordinate geometry to eight equivalent Ni(1) and six equivalent Si(1) atoms. Ni(1) is bonded in a 10-coordinate geometry to four equivalent Ca(1), three equivalent Ni(1), and three equivalent Si(1) atoms. Si(1) is bonded to six equivalent Ca(1) and six equivalent Ni(1) atoms to form a mixture of distorted corner and face-sharing SiCa6Ni6 cuboctahedra. is represented by the CIF file [CIF]
data_CaSiNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.951
_cell_length_b   3.951
_cell_length_c   9.908
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   133.921
_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
  Ca  Ca0  1  0.667  0.333  0.750  1.0
  Ca  Ca1  1  0.333  0.667  0.250  1.0
  Si  Si2  1  0.000  0.000  0.500  1.0
  Si  Si3  1  0.000  0.000  0.000  1.0
  Ni  Ni4  1  0.667  0.333  0.461  1.0
  Ni  Ni5  1  0.333  0.667  0.539  1.0
  Ni  Ni6  1  0.333  0.667  0.961  1.0
  Ni  Ni7  1  0.667  0.333  0.039  1.0
[/CIF]
.