The structure described by Ni16Ti6Si7 crystallizes in the cubic Fm-3m space group. Ti(1) is bonded in a 12-coordinate geometry to four equivalent Ni(1), four equivalent Ni(2), and four equivalent Si(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 12-coordinate geometry to three equivalent Ti(1), three equivalent Ni(1), three equivalent Ni(2), and three equivalent Si(2) atoms. In the second Ni site, Ni(2) is bonded in a 13-coordinate geometry to three equivalent Ti(1), three equivalent Ni(1), three equivalent Ni(2), one Si(1), and three equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a body-centered cubic geometry to eight equivalent Ni(2) atoms. In the second Si site, Si(2) is bonded to four equivalent Ti(1), four equivalent Ni(1), and four equivalent Ni(2) atoms to form a mixture of face and corner-sharing SiTi4Ni8 cuboctahedra. is represented by the CIF file [CIF]
data_Ti6Si7Ni16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.841
_cell_length_b   7.841
_cell_length_c   7.841
_cell_angle_alpha   60.002
_cell_angle_beta   60.002
_cell_angle_gamma   60.002
_symmetry_Int_Tables_number   1
_cell_volume   340.916
_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
  Ti  Ti0  1  0.798  0.202  0.798  1.0
  Ti  Ti1  1  0.202  0.202  0.798  1.0
  Ti  Ti2  1  0.798  0.798  0.202  1.0
  Ti  Ti3  1  0.798  0.202  0.202  1.0
  Ti  Ti4  1  0.202  0.798  0.798  1.0
  Ti  Ti5  1  0.202  0.798  0.202  1.0
  Si  Si6  1  0.500  0.500  0.500  1.0
  Si  Si7  1  1.000  0.500  1.000  1.0
  Si  Si8  1  0.500  1.000  1.000  1.0
  Si  Si9  1  1.000  0.500  0.500  1.0
  Si  Si10  1  0.500  1.000  0.500  1.0
  Si  Si11  1  1.000  1.000  0.500  1.0
  Si  Si12  1  0.500  0.500  1.000  1.0
  Ni  Ni13  1  0.501  0.166  0.166  1.0
  Ni  Ni14  1  0.834  0.834  0.834  1.0
  Ni  Ni15  1  0.146  0.618  0.618  1.0
  Ni  Ni16  1  0.618  0.146  0.618  1.0
  Ni  Ni17  1  0.618  0.618  0.146  1.0
  Ni  Ni18  1  0.382  0.854  0.382  1.0
  Ni  Ni19  1  0.382  0.382  0.854  1.0
  Ni  Ni20  1  0.854  0.382  0.382  1.0
  Ni  Ni21  1  0.618  0.618  0.618  1.0
  Ni  Ni22  1  0.166  0.166  0.501  1.0
  Ni  Ni23  1  0.166  0.501  0.166  1.0
  Ni  Ni24  1  0.834  0.834  0.499  1.0
  Ni  Ni25  1  0.834  0.499  0.834  1.0
  Ni  Ni26  1  0.499  0.834  0.834  1.0
  Ni  Ni27  1  0.166  0.166  0.166  1.0
  Ni  Ni28  1  0.382  0.382  0.382  1.0
[/CIF]
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The structure described by Ni16Ti6Si7 crystallizes in the cubic Fm-3m space group. Ti(1) is bonded in a 12-coordinate geometry to four equivalent Ni(1), four equivalent Ni(2), and four equivalent Si(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 12-coordinate geometry to three equivalent Ti(1), three equivalent Ni(1), three equivalent Ni(2), and three equivalent Si(2) atoms. In the second Ni site, Ni(2) is bonded in a 13-coordinate geometry to three equivalent Ti(1), three equivalent Ni(1), three equivalent Ni(2), one Si(1), and three equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a body-centered cubic geometry to eight equivalent Ni(2) atoms. In the second Si site, Si(2) is bonded to four equivalent Ti(1), four equivalent Ni(1), and four equivalent Ni(2) atoms to form a mixture of face and corner-sharing SiTi4Ni8 cuboctahedra. is represented by the CIF file [CIF]
data_Ti6Si7Ni16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.841
_cell_length_b   7.841
_cell_length_c   7.841
_cell_angle_alpha   60.002
_cell_angle_beta   60.002
_cell_angle_gamma   60.002
_symmetry_Int_Tables_number   1
_cell_volume   340.916
_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
  Ti  Ti0  1  0.798  0.202  0.798  1.0
  Ti  Ti1  1  0.202  0.202  0.798  1.0
  Ti  Ti2  1  0.798  0.798  0.202  1.0
  Ti  Ti3  1  0.798  0.202  0.202  1.0
  Ti  Ti4  1  0.202  0.798  0.798  1.0
  Ti  Ti5  1  0.202  0.798  0.202  1.0
  Si  Si6  1  0.500  0.500  0.500  1.0
  Si  Si7  1  1.000  0.500  1.000  1.0
  Si  Si8  1  0.500  1.000  1.000  1.0
  Si  Si9  1  1.000  0.500  0.500  1.0
  Si  Si10  1  0.500  1.000  0.500  1.0
  Si  Si11  1  1.000  1.000  0.500  1.0
  Si  Si12  1  0.500  0.500  1.000  1.0
  Ni  Ni13  1  0.501  0.166  0.166  1.0
  Ni  Ni14  1  0.834  0.834  0.834  1.0
  Ni  Ni15  1  0.146  0.618  0.618  1.0
  Ni  Ni16  1  0.618  0.146  0.618  1.0
  Ni  Ni17  1  0.618  0.618  0.146  1.0
  Ni  Ni18  1  0.382  0.854  0.382  1.0
  Ni  Ni19  1  0.382  0.382  0.854  1.0
  Ni  Ni20  1  0.854  0.382  0.382  1.0
  Ni  Ni21  1  0.618  0.618  0.618  1.0
  Ni  Ni22  1  0.166  0.166  0.501  1.0
  Ni  Ni23  1  0.166  0.501  0.166  1.0
  Ni  Ni24  1  0.834  0.834  0.499  1.0
  Ni  Ni25  1  0.834  0.499  0.834  1.0
  Ni  Ni26  1  0.499  0.834  0.834  1.0
  Ni  Ni27  1  0.166  0.166  0.166  1.0
  Ni  Ni28  1  0.382  0.382  0.382  1.0
[/CIF]
.