The crystal structure described by Ni9B2Si4 crystallizes in the tetragonal I-42m space group. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 2-coordinate geometry to two equivalent B(1) and four equivalent Si(1) atoms. In the second Ni site, Ni(2) is bonded in a distorted tetrahedral geometry to four equivalent Si(1) atoms. B(1) is bonded in a 10-coordinate geometry to eight equivalent Ni(1) and two equivalent B(1) atoms. Si(1) is bonded in a 9-coordinate geometry to one Ni(2) and eight equivalent Ni(1) atoms. is represented by the CIF card [CIF]
data_Si4Ni9B2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.163
_cell_length_b   6.469
_cell_length_c   6.469
_cell_angle_alpha   95.943
_cell_angle_beta   108.770
_cell_angle_gamma   71.230
_symmetry_Int_Tables_number   1
_cell_volume   156.157
_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
  Si  Si0  1  0.371  0.500  0.185  1.0
  Si  Si1  1  0.687  0.500  0.815  1.0
  Si  Si2  1  0.813  0.815  0.500  1.0
  Si  Si3  1  0.129  0.185  0.500  1.0
  Ni  Ni4  1  0.421  0.873  0.716  1.0
  Ni  Ni5  1  0.579  0.127  0.284  1.0
  Ni  Ni6  1  0.921  0.284  0.127  1.0
  Ni  Ni7  1  0.079  0.716  0.873  1.0
  Ni  Ni8  1  0.705  0.716  0.127  1.0
  Ni  Ni9  1  0.294  0.284  0.873  1.0
  Ni  Ni10  1  0.795  0.127  0.716  1.0
  Ni  Ni11  1  0.206  0.873  0.284  1.0
  Ni  Ni12  1  0.250  0.500  0.500  1.0
  B  B13  1  0.250  0.000  0.000  1.0
  B  B14  1  0.750  0.000  0.000  1.0
[/CIF]
.
The crystal structure described by Ni9B2Si4 crystallizes in the tetragonal I-42m space group. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 2-coordinate geometry to two equivalent B(1) and four equivalent Si(1) atoms. In the second Ni site, Ni(2) is bonded in a distorted tetrahedral geometry to four equivalent Si(1) atoms. B(1) is bonded in a 10-coordinate geometry to eight equivalent Ni(1) and two equivalent B(1) atoms. Si(1) is bonded in a 9-coordinate geometry to one Ni(2) and eight equivalent Ni(1) atoms. is represented by the CIF card [CIF]
data_Si4Ni9B2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.163
_cell_length_b   6.469
_cell_length_c   6.469
_cell_angle_alpha   95.943
_cell_angle_beta   108.770
_cell_angle_gamma   71.230
_symmetry_Int_Tables_number   1
_cell_volume   156.157
_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
  Si  Si0  1  0.371  0.500  0.185  1.0
  Si  Si1  1  0.687  0.500  0.815  1.0
  Si  Si2  1  0.813  0.815  0.500  1.0
  Si  Si3  1  0.129  0.185  0.500  1.0
  Ni  Ni4  1  0.421  0.873  0.716  1.0
  Ni  Ni5  1  0.579  0.127  0.284  1.0
  Ni  Ni6  1  0.921  0.284  0.127  1.0
  Ni  Ni7  1  0.079  0.716  0.873  1.0
  Ni  Ni8  1  0.705  0.716  0.127  1.0
  Ni  Ni9  1  0.294  0.284  0.873  1.0
  Ni  Ni10  1  0.795  0.127  0.716  1.0
  Ni  Ni11  1  0.206  0.873  0.284  1.0
  Ni  Ni12  1  0.250  0.500  0.500  1.0
  B  B13  1  0.250  0.000  0.000  1.0
  B  B14  1  0.750  0.000  0.000  1.0
[/CIF]
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