The material described by CeNi9Si2 crystallizes in the tetragonal I4_1/amd space group. Ce(1) is bonded in a 22-coordinate geometry to two equivalent Ni(1), sixteen equivalent Ni(2), and four equivalent Si(1) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 14-coordinate geometry to two equivalent Ce(1), eight equivalent Ni(2), and four equivalent Si(1) atoms. In the second Ni site, Ni(2) is bonded to two equivalent Ce(1), one Ni(1), seven equivalent Ni(2), and two equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing NiCe2Si2Ni8 cuboctahedra. Si(1) is bonded in a 10-coordinate geometry to two equivalent Ce(1), two equivalent Ni(1), and eight equivalent Ni(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeSi2Ni9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.564
_cell_length_b   7.564
_cell_length_c   7.564
_cell_angle_alpha   99.527
_cell_angle_beta   99.527
_cell_angle_gamma   131.989
_symmetry_Int_Tables_number   1
_cell_volume   293.789
_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
  Ce  Ce0  1  0.500  0.500  0.000  1.0
  Ce  Ce1  1  0.750  0.250  0.500  1.0
  Si  Si2  1  0.625  0.875  0.750  1.0
  Si  Si3  1  0.125  0.375  0.250  1.0
  Si  Si4  1  0.125  0.875  0.750  1.0
  Si  Si5  1  0.125  0.875  0.250  1.0
  Ni  Ni6  1  0.250  0.750  0.500  1.0
  Ni  Ni7  1  0.000  0.000  0.000  1.0
  Ni  Ni8  1  0.688  0.014  0.079  1.0
  Ni  Ni9  1  0.688  0.609  0.673  1.0
  Ni  Ni10  1  0.264  0.438  0.579  1.0
  Ni  Ni11  1  0.264  0.686  0.827  1.0
  Ni  Ni12  1  0.936  0.014  0.327  1.0
  Ni  Ni13  1  0.936  0.609  0.921  1.0
  Ni  Ni14  1  0.859  0.438  0.173  1.0
  Ni  Ni15  1  0.859  0.686  0.421  1.0
  Ni  Ni16  1  0.562  0.736  0.421  1.0
  Ni  Ni17  1  0.562  0.141  0.827  1.0
  Ni  Ni18  1  0.986  0.312  0.921  1.0
  Ni  Ni19  1  0.986  0.064  0.673  1.0
  Ni  Ni20  1  0.314  0.736  0.173  1.0
  Ni  Ni21  1  0.314  0.141  0.579  1.0
  Ni  Ni22  1  0.391  0.312  0.327  1.0
  Ni  Ni23  1  0.391  0.064  0.079  1.0
[/CIF]
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The material described by CeNi9Si2 crystallizes in the tetragonal I4_1/amd space group. Ce(1) is bonded in a 22-coordinate geometry to two equivalent Ni(1), sixteen equivalent Ni(2), and four equivalent Si(1) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 14-coordinate geometry to two equivalent Ce(1), eight equivalent Ni(2), and four equivalent Si(1) atoms. In the second Ni site, Ni(2) is bonded to two equivalent Ce(1), one Ni(1), seven equivalent Ni(2), and two equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing NiCe2Si2Ni8 cuboctahedra. Si(1) is bonded in a 10-coordinate geometry to two equivalent Ce(1), two equivalent Ni(1), and eight equivalent Ni(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeSi2Ni9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.564
_cell_length_b   7.564
_cell_length_c   7.564
_cell_angle_alpha   99.527
_cell_angle_beta   99.527
_cell_angle_gamma   131.989
_symmetry_Int_Tables_number   1
_cell_volume   293.789
_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
  Ce  Ce0  1  0.500  0.500  0.000  1.0
  Ce  Ce1  1  0.750  0.250  0.500  1.0
  Si  Si2  1  0.625  0.875  0.750  1.0
  Si  Si3  1  0.125  0.375  0.250  1.0
  Si  Si4  1  0.125  0.875  0.750  1.0
  Si  Si5  1  0.125  0.875  0.250  1.0
  Ni  Ni6  1  0.250  0.750  0.500  1.0
  Ni  Ni7  1  0.000  0.000  0.000  1.0
  Ni  Ni8  1  0.688  0.014  0.079  1.0
  Ni  Ni9  1  0.688  0.609  0.673  1.0
  Ni  Ni10  1  0.264  0.438  0.579  1.0
  Ni  Ni11  1  0.264  0.686  0.827  1.0
  Ni  Ni12  1  0.936  0.014  0.327  1.0
  Ni  Ni13  1  0.936  0.609  0.921  1.0
  Ni  Ni14  1  0.859  0.438  0.173  1.0
  Ni  Ni15  1  0.859  0.686  0.421  1.0
  Ni  Ni16  1  0.562  0.736  0.421  1.0
  Ni  Ni17  1  0.562  0.141  0.827  1.0
  Ni  Ni18  1  0.986  0.312  0.921  1.0
  Ni  Ni19  1  0.986  0.064  0.673  1.0
  Ni  Ni20  1  0.314  0.736  0.173  1.0
  Ni  Ni21  1  0.314  0.141  0.579  1.0
  Ni  Ni22  1  0.391  0.312  0.327  1.0
  Ni  Ni23  1  0.391  0.064  0.079  1.0
[/CIF]
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