The crystal structure described by Tb6Pt3Ga19 crystallizes in the monoclinic Cm space group. There are six inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 16-coordinate geometry to two equivalent Pt(2), one Ga(1), one Ga(3), one Ga(5), one Ga(7), two equivalent Ga(11), two equivalent Ga(13), two equivalent Ga(15), two equivalent Ga(19), and two equivalent Ga(9) atoms. In the second Tb site, Tb(2) is bonded in a 12-coordinate geometry to two equivalent Pt(1), one Ga(2), one Ga(4), one Ga(6), one Ga(8), two equivalent Ga(10), two equivalent Ga(12), two equivalent Ga(14), and two equivalent Ga(16) atoms. In the third Tb site, Tb(3) is bonded in a 12-coordinate geometry to one Pt(1), one Pt(2), one Ga(5), two equivalent Ga(11), two equivalent Ga(15), two equivalent Ga(18), two equivalent Ga(4), and two equivalent Ga(7) atoms. In the fourth Tb site, Tb(4) is bonded in a 12-coordinate geometry to one Pt(3), one Ga(19), two equivalent Ga(12), two equivalent Ga(16), two equivalent Ga(17), two equivalent Ga(3), and two equivalent Ga(8) atoms. In the fifth Tb site, Tb(5) is bonded in a 12-coordinate geometry to one Pt(3), one Ga(19), one Ga(3), two equivalent Ga(13), two equivalent Ga(17), two equivalent Ga(2), two equivalent Ga(5), and two equivalent Ga(9) atoms. In the sixth Tb site, Tb(6) is bonded in a 12-coordinate geometry to one Pt(1), one Pt(2), one Ga(8), two equivalent Ga(1), two equivalent Ga(10), two equivalent Ga(14), two equivalent Ga(18), and two equivalent Ga(6) atoms. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 12-coordinate geometry to one Tb(3), one Tb(6), two equivalent Tb(2), one Ga(10), one Ga(16), two equivalent Ga(18), two equivalent Ga(4), and two equivalent Ga(6) atoms. In the second Pt site, Pt(2) is bonded in a 10-coordinate geometry to one Tb(3), one Tb(6), two equivalent Tb(1), one Ga(11), one Ga(13), two equivalent Ga(1), two equivalent Ga(18), and two equivalent Ga(7) atoms. In the third Pt site, Pt(3) is bonded in a 10-coordinate geometry to one Tb(4), one Tb(5), one Ga(12), one Ga(14), two equivalent Ga(17), two equivalent Ga(2), and two equivalent Ga(8) atoms. There are nineteen inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Tb(1), two equivalent Tb(6), two equivalent Pt(2), one Ga(10), one Ga(18), and two equivalent Ga(11) atoms. In the second Ga site, Ga(2) is bonded in a 2-coordinate geometry to one Tb(2), two equivalent Tb(5), two equivalent Pt(3), one Ga(17), one Ga(9), and two equivalent Ga(12) atoms. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(5), two equivalent Tb(4), one Ga(12), one Ga(17), two equivalent Ga(19), and two equivalent Ga(9) atoms. In the fourth Ga site, Ga(4) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(3), two equivalent Pt(1), one Ga(11), one Ga(18), and two equivalent Ga(10) atoms. In the fifth Ga site, Ga(5) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(3), two equivalent Tb(5), one Ga(13), one Ga(17), two equivalent Ga(15), and two equivalent Ga(19) atoms. In the sixth Ga site, Ga(6) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(6), two equivalent Pt(1), one Ga(14), one Ga(18), and two equivalent Ga(16) atoms. In the seventh Ga site, Ga(7) is bonded in a 2-coordinate geometry to one Tb(1), two equivalent Tb(3), two equivalent Pt(2), one Ga(15), one Ga(18), and two equivalent Ga(13) atoms. In the eighth Ga site, Ga(8) is bonded in a 10-coordinate geometry to one Tb(2), one Tb(6), two equivalent Tb(4), two equivalent Pt(3), one Ga(16), one Ga(17), and two equivalent Ga(14) atoms. In the ninth Ga site, Ga(9) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(5), one Ga(13), one Ga(19), one Ga(2), and two equivalent Ga(3) atoms. In the tenth Ga site, Ga(10) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(6), one Pt(1), one Ga(1), one Ga(14), and two equivalent Ga(4) atoms. In the eleventh Ga site, Ga(11) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), one Pt(2), one Ga(15), one Ga(4), and two equivalent Ga(1) atoms. In the twelfth Ga site, Ga(12) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), one Pt(3), one Ga(16), one Ga(3), and two equivalent Ga(2) atoms. In the thirteenth Ga site, Ga(13) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(5), one Pt(2), one Ga(5), one Ga(9), and two equivalent Ga(7) atoms. In the fourteenth Ga site, Ga(14) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(6), one Pt(3), one Ga(10), one Ga(6), and two equivalent Ga(8) atoms. In the fifteenth Ga site, Ga(15) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), one Ga(11), one Ga(19), one Ga(7), and two equivalent Ga(5) atoms. In the sixteenth Ga site, Ga(16) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), one Pt(1), one Ga(12), one Ga(8), and two equivalent Ga(6) atoms. In the seventeenth Ga site, Ga(17) is bonded in a 10-coordinate geometry to two equivalent Tb(4), two equivalent Tb(5), two equivalent Pt(3), one Ga(2), one Ga(3), one Ga(5), and one Ga(8) atom. In the eighteenth Ga site, Ga(18) is bonded to two equivalent Tb(3), two equivalent Tb(6), two equivalent Pt(1), two equivalent Pt(2), one Ga(1), one Ga(4), one Ga(6), and one Ga(7) atom to form face-sharing GaTb4Ga4Pt4 cuboctahedra. In the nineteenth Ga site, Ga(19) is bonded in a 8-coordinate geometry to one Tb(4), one Tb(5), two equivalent Tb(1), one Ga(15), one Ga(9), two equivalent Ga(3), and two equivalent Ga(5) atoms. is represented by the CIF file [CIF]
data_Tb6Ga19Pt3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.242
_cell_length_b   8.267
_cell_length_c   16.552
_cell_angle_alpha   108.831
_cell_angle_beta   82.639
_cell_angle_gamma   104.864
_symmetry_Int_Tables_number   1
_cell_volume   530.332
_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
  Tb  Tb0  1  0.251  0.749  0.248  1.0
  Tb  Tb1  1  0.751  0.252  0.749  1.0
  Tb  Tb2  1  0.408  0.229  0.413  1.0
  Tb  Tb3  1  0.913  0.735  0.910  1.0
  Tb  Tb4  1  0.086  0.263  0.090  1.0
  Tb  Tb5  1  0.590  0.770  0.590  1.0
  Ga  Ga6  1  0.174  0.803  0.456  1.0
  Ga  Ga7  1  0.682  0.317  0.953  1.0
  Ga  Ga8  1  0.316  0.672  0.041  1.0
  Ga  Ga9  1  0.824  0.195  0.547  1.0
  Ga  Ga10  1  0.456  0.097  0.185  1.0
  Ga  Ga11  1  0.957  0.590  0.676  1.0
  Ga  Ga12  1  0.043  0.413  0.327  1.0
  Ga  Ga13  1  0.548  0.915  0.818  1.0
  Ga  Ga14  1  0.725  0.555  0.106  1.0
  Ga  Ga15  1  0.230  0.065  0.604  1.0
  Ga  Ga16  1  0.767  0.934  0.399  1.0
  Ga  Ga17  1  0.272  0.433  0.889  1.0
  Ga  Ga18  1  0.605  0.441  0.232  1.0
  Ga  Ga19  1  0.107  0.944  0.729  1.0
  Ga  Ga20  1  0.892  0.058  0.274  1.0
  Ga  Ga21  1  0.398  0.565  0.770  1.0
  Ga  Ga22  1  0.508  0.008  0.993  1.0
  Ga  Ga23  1  0.999  0.499  0.501  1.0
  Ga  Ga24  1  0.889  0.888  0.109  1.0
  Pt  Pt25  1  0.391  0.392  0.611  1.0
  Pt  Pt26  1  0.609  0.607  0.390  1.0
  Pt  Pt27  1  0.110  0.111  0.892  1.0
[/CIF]
.
The crystal structure described by Tb6Pt3Ga19 crystallizes in the monoclinic Cm space group. There are six inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 16-coordinate geometry to two equivalent Pt(2), one Ga(1), one Ga(3), one Ga(5), one Ga(7), two equivalent Ga(11), two equivalent Ga(13), two equivalent Ga(15), two equivalent Ga(19), and two equivalent Ga(9) atoms. In the second Tb site, Tb(2) is bonded in a 12-coordinate geometry to two equivalent Pt(1), one Ga(2), one Ga(4), one Ga(6), one Ga(8), two equivalent Ga(10), two equivalent Ga(12), two equivalent Ga(14), and two equivalent Ga(16) atoms. In the third Tb site, Tb(3) is bonded in a 12-coordinate geometry to one Pt(1), one Pt(2), one Ga(5), two equivalent Ga(11), two equivalent Ga(15), two equivalent Ga(18), two equivalent Ga(4), and two equivalent Ga(7) atoms. In the fourth Tb site, Tb(4) is bonded in a 12-coordinate geometry to one Pt(3), one Ga(19), two equivalent Ga(12), two equivalent Ga(16), two equivalent Ga(17), two equivalent Ga(3), and two equivalent Ga(8) atoms. In the fifth Tb site, Tb(5) is bonded in a 12-coordinate geometry to one Pt(3), one Ga(19), one Ga(3), two equivalent Ga(13), two equivalent Ga(17), two equivalent Ga(2), two equivalent Ga(5), and two equivalent Ga(9) atoms. In the sixth Tb site, Tb(6) is bonded in a 12-coordinate geometry to one Pt(1), one Pt(2), one Ga(8), two equivalent Ga(1), two equivalent Ga(10), two equivalent Ga(14), two equivalent Ga(18), and two equivalent Ga(6) atoms. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 12-coordinate geometry to one Tb(3), one Tb(6), two equivalent Tb(2), one Ga(10), one Ga(16), two equivalent Ga(18), two equivalent Ga(4), and two equivalent Ga(6) atoms. In the second Pt site, Pt(2) is bonded in a 10-coordinate geometry to one Tb(3), one Tb(6), two equivalent Tb(1), one Ga(11), one Ga(13), two equivalent Ga(1), two equivalent Ga(18), and two equivalent Ga(7) atoms. In the third Pt site, Pt(3) is bonded in a 10-coordinate geometry to one Tb(4), one Tb(5), one Ga(12), one Ga(14), two equivalent Ga(17), two equivalent Ga(2), and two equivalent Ga(8) atoms. There are nineteen inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Tb(1), two equivalent Tb(6), two equivalent Pt(2), one Ga(10), one Ga(18), and two equivalent Ga(11) atoms. In the second Ga site, Ga(2) is bonded in a 2-coordinate geometry to one Tb(2), two equivalent Tb(5), two equivalent Pt(3), one Ga(17), one Ga(9), and two equivalent Ga(12) atoms. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(5), two equivalent Tb(4), one Ga(12), one Ga(17), two equivalent Ga(19), and two equivalent Ga(9) atoms. In the fourth Ga site, Ga(4) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(3), two equivalent Pt(1), one Ga(11), one Ga(18), and two equivalent Ga(10) atoms. In the fifth Ga site, Ga(5) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(3), two equivalent Tb(5), one Ga(13), one Ga(17), two equivalent Ga(15), and two equivalent Ga(19) atoms. In the sixth Ga site, Ga(6) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(6), two equivalent Pt(1), one Ga(14), one Ga(18), and two equivalent Ga(16) atoms. In the seventh Ga site, Ga(7) is bonded in a 2-coordinate geometry to one Tb(1), two equivalent Tb(3), two equivalent Pt(2), one Ga(15), one Ga(18), and two equivalent Ga(13) atoms. In the eighth Ga site, Ga(8) is bonded in a 10-coordinate geometry to one Tb(2), one Tb(6), two equivalent Tb(4), two equivalent Pt(3), one Ga(16), one Ga(17), and two equivalent Ga(14) atoms. In the ninth Ga site, Ga(9) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(5), one Ga(13), one Ga(19), one Ga(2), and two equivalent Ga(3) atoms. In the tenth Ga site, Ga(10) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(6), one Pt(1), one Ga(1), one Ga(14), and two equivalent Ga(4) atoms. In the eleventh Ga site, Ga(11) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), one Pt(2), one Ga(15), one Ga(4), and two equivalent Ga(1) atoms. In the twelfth Ga site, Ga(12) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), one Pt(3), one Ga(16), one Ga(3), and two equivalent Ga(2) atoms. In the thirteenth Ga site, Ga(13) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(5), one Pt(2), one Ga(5), one Ga(9), and two equivalent Ga(7) atoms. In the fourteenth Ga site, Ga(14) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(6), one Pt(3), one Ga(10), one Ga(6), and two equivalent Ga(8) atoms. In the fifteenth Ga site, Ga(15) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), one Ga(11), one Ga(19), one Ga(7), and two equivalent Ga(5) atoms. In the sixteenth Ga site, Ga(16) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), one Pt(1), one Ga(12), one Ga(8), and two equivalent Ga(6) atoms. In the seventeenth Ga site, Ga(17) is bonded in a 10-coordinate geometry to two equivalent Tb(4), two equivalent Tb(5), two equivalent Pt(3), one Ga(2), one Ga(3), one Ga(5), and one Ga(8) atom. In the eighteenth Ga site, Ga(18) is bonded to two equivalent Tb(3), two equivalent Tb(6), two equivalent Pt(1), two equivalent Pt(2), one Ga(1), one Ga(4), one Ga(6), and one Ga(7) atom to form face-sharing GaTb4Ga4Pt4 cuboctahedra. In the nineteenth Ga site, Ga(19) is bonded in a 8-coordinate geometry to one Tb(4), one Tb(5), two equivalent Tb(1), one Ga(15), one Ga(9), two equivalent Ga(3), and two equivalent Ga(5) atoms. is represented by the CIF file [CIF]
data_Tb6Ga19Pt3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.242
_cell_length_b   8.267
_cell_length_c   16.552
_cell_angle_alpha   108.831
_cell_angle_beta   82.639
_cell_angle_gamma   104.864
_symmetry_Int_Tables_number   1
_cell_volume   530.332
_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
  Tb  Tb0  1  0.251  0.749  0.248  1.0
  Tb  Tb1  1  0.751  0.252  0.749  1.0
  Tb  Tb2  1  0.408  0.229  0.413  1.0
  Tb  Tb3  1  0.913  0.735  0.910  1.0
  Tb  Tb4  1  0.086  0.263  0.090  1.0
  Tb  Tb5  1  0.590  0.770  0.590  1.0
  Ga  Ga6  1  0.174  0.803  0.456  1.0
  Ga  Ga7  1  0.682  0.317  0.953  1.0
  Ga  Ga8  1  0.316  0.672  0.041  1.0
  Ga  Ga9  1  0.824  0.195  0.547  1.0
  Ga  Ga10  1  0.456  0.097  0.185  1.0
  Ga  Ga11  1  0.957  0.590  0.676  1.0
  Ga  Ga12  1  0.043  0.413  0.327  1.0
  Ga  Ga13  1  0.548  0.915  0.818  1.0
  Ga  Ga14  1  0.725  0.555  0.106  1.0
  Ga  Ga15  1  0.230  0.065  0.604  1.0
  Ga  Ga16  1  0.767  0.934  0.399  1.0
  Ga  Ga17  1  0.272  0.433  0.889  1.0
  Ga  Ga18  1  0.605  0.441  0.232  1.0
  Ga  Ga19  1  0.107  0.944  0.729  1.0
  Ga  Ga20  1  0.892  0.058  0.274  1.0
  Ga  Ga21  1  0.398  0.565  0.770  1.0
  Ga  Ga22  1  0.508  0.008  0.993  1.0
  Ga  Ga23  1  0.999  0.499  0.501  1.0
  Ga  Ga24  1  0.889  0.888  0.109  1.0
  Pt  Pt25  1  0.391  0.392  0.611  1.0
  Pt  Pt26  1  0.609  0.607  0.390  1.0
  Pt  Pt27  1  0.110  0.111  0.892  1.0
[/CIF]
.