The crystal structure described by Tm2Ni3Si5 crystallizes in the orthorhombic Ibam space group. Tm(1) is bonded in a 16-coordinate geometry to two equivalent Ni(1), four equivalent Ni(2), two equivalent Si(1), four equivalent Si(2), and four equivalent Si(3) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to four equivalent Tm(1), two equivalent Ni(1), two equivalent Si(2), and four equivalent Si(3) atoms to form a mixture of distorted corner and face-sharing NiTm4Si6Ni2 cuboctahedra. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to four equivalent Tm(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent Tm(1) and four equivalent Ni(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent Tm(1), one Ni(1), two equivalent Ni(2), and two equivalent Si(3) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Tm(1), one Ni(2), two equivalent Ni(1), and two equivalent Si(2) atoms. is represented by the CIF card [CIF]
data_Tm2Si5Ni3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.822
_cell_length_b   7.822
_cell_length_c   7.822
_cell_angle_alpha   138.067
_cell_angle_beta   104.087
_cell_angle_gamma   90.726
_symmetry_Int_Tables_number   1
_cell_volume   296.043
_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
  Tm  Tm0  1  0.867  0.630  0.237  1.0
  Tm  Tm1  1  0.133  0.370  0.763  1.0
  Tm  Tm2  1  0.393  0.130  0.263  1.0
  Tm  Tm3  1  0.607  0.870  0.737  1.0
  Si  Si4  1  0.500  0.750  0.250  1.0
  Si  Si5  1  0.500  0.250  0.750  1.0
  Si  Si6  1  0.236  0.986  0.750  1.0
  Si  Si7  1  0.764  0.514  0.750  1.0
  Si  Si8  1  0.764  0.014  0.250  1.0
  Si  Si9  1  0.236  0.486  0.250  1.0
  Si  Si10  1  0.042  0.891  0.151  1.0
  Si  Si11  1  0.958  0.109  0.849  1.0
  Si  Si12  1  0.740  0.391  0.349  1.0
  Si  Si13  1  0.260  0.609  0.651  1.0
  Ni  Ni14  1  0.000  0.750  0.750  1.0
  Ni  Ni15  1  0.000  0.250  0.250  1.0
  Ni  Ni16  1  0.250  0.866  0.384  1.0
  Ni  Ni17  1  0.750  0.134  0.616  1.0
  Ni  Ni18  1  0.483  0.366  0.116  1.0
  Ni  Ni19  1  0.517  0.634  0.884  1.0
[/CIF]
.
The crystal structure described by Tm2Ni3Si5 crystallizes in the orthorhombic Ibam space group. Tm(1) is bonded in a 16-coordinate geometry to two equivalent Ni(1), four equivalent Ni(2), two equivalent Si(1), four equivalent Si(2), and four equivalent Si(3) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to four equivalent Tm(1), two equivalent Ni(1), two equivalent Si(2), and four equivalent Si(3) atoms to form a mixture of distorted corner and face-sharing NiTm4Si6Ni2 cuboctahedra. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to four equivalent Tm(1), one Si(3), two equivalent Si(1), and two equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent Tm(1) and four equivalent Ni(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent Tm(1), one Ni(1), two equivalent Ni(2), and two equivalent Si(3) atoms. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Tm(1), one Ni(2), two equivalent Ni(1), and two equivalent Si(2) atoms. is represented by the CIF card [CIF]
data_Tm2Si5Ni3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.822
_cell_length_b   7.822
_cell_length_c   7.822
_cell_angle_alpha   138.067
_cell_angle_beta   104.087
_cell_angle_gamma   90.726
_symmetry_Int_Tables_number   1
_cell_volume   296.043
_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
  Tm  Tm0  1  0.867  0.630  0.237  1.0
  Tm  Tm1  1  0.133  0.370  0.763  1.0
  Tm  Tm2  1  0.393  0.130  0.263  1.0
  Tm  Tm3  1  0.607  0.870  0.737  1.0
  Si  Si4  1  0.500  0.750  0.250  1.0
  Si  Si5  1  0.500  0.250  0.750  1.0
  Si  Si6  1  0.236  0.986  0.750  1.0
  Si  Si7  1  0.764  0.514  0.750  1.0
  Si  Si8  1  0.764  0.014  0.250  1.0
  Si  Si9  1  0.236  0.486  0.250  1.0
  Si  Si10  1  0.042  0.891  0.151  1.0
  Si  Si11  1  0.958  0.109  0.849  1.0
  Si  Si12  1  0.740  0.391  0.349  1.0
  Si  Si13  1  0.260  0.609  0.651  1.0
  Ni  Ni14  1  0.000  0.750  0.750  1.0
  Ni  Ni15  1  0.000  0.250  0.250  1.0
  Ni  Ni16  1  0.250  0.866  0.384  1.0
  Ni  Ni17  1  0.750  0.134  0.616  1.0
  Ni  Ni18  1  0.483  0.366  0.116  1.0
  Ni  Ni19  1  0.517  0.634  0.884  1.0
[/CIF]
.