The structure described by Yb4(Pt3Al8)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 17-coordinate geometry to one Pt(1), one Pt(3), one Pt(4), one Pt(5), two equivalent Pt(2), one Al(10), one Al(11), one Al(12), one Al(3), one Al(4), one Al(5), one Al(6), one Al(7), one Al(8), and two equivalent Al(1) atoms. In the second Yb site, Yb(2) is bonded in a 17-coordinate geometry to one Pt(1), one Pt(3), one Pt(4), one Pt(5), two equivalent Pt(2), one Al(1), one Al(10), one Al(11), one Al(12), one Al(4), one Al(5), one Al(6), one Al(8), one Al(9), and two equivalent Al(7) atoms. There are five inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 8-coordinate geometry to one Yb(1), one Yb(2), one Al(11), one Al(2), one Al(3), one Al(4), one Al(5), one Al(6), and two equivalent Al(9) atoms. In the second Pt site, Pt(2) is bonded in a 8-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), one Al(10), one Al(12), two equivalent Al(1), two equivalent Al(7), and two equivalent Al(8) atoms. In the third Pt site, Pt(3) is bonded in a 8-coordinate geometry to one Yb(1), one Yb(2), one Al(10), one Al(2), one Al(4), one Al(5), one Al(6), one Al(9), and two equivalent Al(3) atoms. In the fourth Pt site, Pt(4) is bonded in a 8-coordinate geometry to one Yb(1), one Yb(2), one Al(12), one Al(3), one Al(4), one Al(5), one Al(6), one Al(9), and two equivalent Al(2) atoms. In the fifth Pt site, Pt(5) is bonded in a 8-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), two equivalent Al(1), two equivalent Al(11), two equivalent Al(7), and two equivalent Al(8) atoms. There are twelve inequivalent Al sites. In the first Al site, Al(1) is bonded in a 3-coordinate geometry to one Yb(2), two equivalent Yb(1), one Pt(5), and two equivalent Pt(2) atoms. In the second Al site, Al(2) is bonded to one Pt(1), one Pt(3), and two equivalent Pt(4) atoms to form distorted AlPt4 tetrahedra that share corners with three equivalent Al(3)YbPt4 tetrahedra, corners with three equivalent Al(9)YbPt4 tetrahedra,  an edgeedge with one Al(2)Pt4 tetrahedra,  an edgeedge with one Al(3)YbPt4 tetrahedra, and  an edgeedge with one Al(9)YbPt4 tetrahedra. In the third Al site, Al(3) is bonded to one Yb(1), one Pt(1), one Pt(4), and two equivalent Pt(3) atoms to form distorted AlYbPt4 tetrahedra that share corners with three equivalent Al(2)Pt4 tetrahedra, corners with three equivalent Al(9)YbPt4 tetrahedra,  an edgeedge with one Al(2)Pt4 tetrahedra,  an edgeedge with one Al(3)YbPt4 tetrahedra, and  an edgeedge with one Al(9)YbPt4 tetrahedra. In the fourth Al site, Al(4) is bonded in a 3-coordinate geometry to one Yb(1), one Yb(2), one Pt(1), one Pt(3), and one Pt(4) atom. In the fifth Al site, Al(5) is bonded in a 3-coordinate geometry to one Yb(1), one Yb(2), one Pt(1), one Pt(3), and one Pt(4) atom. In the sixth Al site, Al(6) is bonded in a 3-coordinate geometry to one Yb(1), one Yb(2), one Pt(1), one Pt(3), and one Pt(4) atom. In the seventh Al site, Al(7) is bonded in a 3-coordinate geometry to one Yb(1), two equivalent Yb(2), one Pt(5), and two equivalent Pt(2) atoms. In the eighth Al site, Al(8) is bonded in a 3-coordinate geometry to one Yb(1), one Yb(2), one Pt(5), and two equivalent Pt(2) atoms. In the ninth Al site, Al(9) is bonded to one Yb(2), one Pt(3), one Pt(4), and two equivalent Pt(1) atoms to form distorted AlYbPt4 tetrahedra that share corners with three equivalent Al(2)Pt4 tetrahedra, corners with three equivalent Al(3)YbPt4 tetrahedra,  an edgeedge with one Al(2)Pt4 tetrahedra,  an edgeedge with one Al(3)YbPt4 tetrahedra, and  an edgeedge with one Al(9)YbPt4 tetrahedra. In the tenth Al site, Al(10) is bonded in a 2-coordinate geometry to one Yb(1), one Yb(2), one Pt(2), and one Pt(3) atom. In the eleventh Al site, Al(11) is bonded in a 2-coordinate geometry to one Yb(1), one Yb(2), one Pt(1), and one Pt(5) atom. In the twelfth Al site, Al(12) is bonded in a 2-coordinate geometry to one Yb(1), one Yb(2), one Pt(2), and one Pt(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Yb4(Al8Pt3)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.466
_cell_length_b   7.465
_cell_length_c   13.230
_cell_angle_alpha   84.615
_cell_angle_beta   100.816
_cell_angle_gamma   119.889
_symmetry_Int_Tables_number   1
_cell_volume   627.940
_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
  Yb  Yb0  1  0.437  0.832  0.807  1.0
  Yb  Yb1  1  0.563  0.168  0.193  1.0
  Yb  Yb2  1  0.767  0.500  0.807  1.0
  Yb  Yb3  1  0.233  0.500  0.193  1.0
  Al  Al4  1  0.481  0.166  0.947  1.0
  Al  Al5  1  0.519  0.834  0.053  1.0
  Al  Al6  1  0.021  0.169  0.560  1.0
  Al  Al7  1  0.979  0.831  0.440  1.0
  Al  Al8  1  0.353  0.833  0.559  1.0
  Al  Al9  1  0.647  0.167  0.441  1.0
  Al  Al10  1  0.619  0.835  0.329  1.0
  Al  Al11  1  0.381  0.165  0.671  1.0
  Al  Al12  1  0.056  0.493  0.670  1.0
  Al  Al13  1  0.944  0.507  0.330  1.0
  Al  Al14  1  0.731  0.841  0.668  1.0
  Al  Al15  1  0.269  0.159  0.332  1.0
  Al  Al16  1  0.149  0.499  0.947  1.0
  Al  Al17  1  0.851  0.501  0.053  1.0
  Al  Al18  1  0.819  0.834  0.956  1.0
  Al  Al19  1  0.181  0.166  0.044  1.0
  Al  Al20  1  0.315  0.501  0.441  1.0
  Al  Al21  1  0.685  0.499  0.559  1.0
  Al  Al22  1  0.101  0.835  0.183  1.0
  Al  Al23  1  0.899  0.165  0.817  1.0
  Al  Al24  1  0.308  0.370  0.816  1.0
  Al  Al25  1  0.692  0.630  0.184  1.0
  Al  Al26  1  0.104  0.959  0.817  1.0
  Al  Al27  1  0.896  0.041  0.183  1.0
  Pt  Pt28  1  0.387  0.508  0.638  1.0
  Pt  Pt29  1  0.613  0.492  0.362  1.0
  Pt  Pt30  1  0.172  0.828  0.000  1.0
  Pt  Pt31  1  0.828  0.172  1.000  1.0
  Pt  Pt32  1  0.296  0.833  0.362  1.0
  Pt  Pt33  1  0.704  0.167  0.638  1.0
  Pt  Pt34  1  0.045  0.825  0.637  1.0
  Pt  Pt35  1  0.955  0.175  0.363  1.0
  Pt  Pt36  1  0.500  0.500  0.000  1.0
[/CIF]
.
The structure described by Yb4(Pt3Al8)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 17-coordinate geometry to one Pt(1), one Pt(3), one Pt(4), one Pt(5), two equivalent Pt(2), one Al(10), one Al(11), one Al(12), one Al(3), one Al(4), one Al(5), one Al(6), one Al(7), one Al(8), and two equivalent Al(1) atoms. In the second Yb site, Yb(2) is bonded in a 17-coordinate geometry to one Pt(1), one Pt(3), one Pt(4), one Pt(5), two equivalent Pt(2), one Al(1), one Al(10), one Al(11), one Al(12), one Al(4), one Al(5), one Al(6), one Al(8), one Al(9), and two equivalent Al(7) atoms. There are five inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 8-coordinate geometry to one Yb(1), one Yb(2), one Al(11), one Al(2), one Al(3), one Al(4), one Al(5), one Al(6), and two equivalent Al(9) atoms. In the second Pt site, Pt(2) is bonded in a 8-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), one Al(10), one Al(12), two equivalent Al(1), two equivalent Al(7), and two equivalent Al(8) atoms. In the third Pt site, Pt(3) is bonded in a 8-coordinate geometry to one Yb(1), one Yb(2), one Al(10), one Al(2), one Al(4), one Al(5), one Al(6), one Al(9), and two equivalent Al(3) atoms. In the fourth Pt site, Pt(4) is bonded in a 8-coordinate geometry to one Yb(1), one Yb(2), one Al(12), one Al(3), one Al(4), one Al(5), one Al(6), one Al(9), and two equivalent Al(2) atoms. In the fifth Pt site, Pt(5) is bonded in a 8-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), two equivalent Al(1), two equivalent Al(11), two equivalent Al(7), and two equivalent Al(8) atoms. There are twelve inequivalent Al sites. In the first Al site, Al(1) is bonded in a 3-coordinate geometry to one Yb(2), two equivalent Yb(1), one Pt(5), and two equivalent Pt(2) atoms. In the second Al site, Al(2) is bonded to one Pt(1), one Pt(3), and two equivalent Pt(4) atoms to form distorted AlPt4 tetrahedra that share corners with three equivalent Al(3)YbPt4 tetrahedra, corners with three equivalent Al(9)YbPt4 tetrahedra,  an edgeedge with one Al(2)Pt4 tetrahedra,  an edgeedge with one Al(3)YbPt4 tetrahedra, and  an edgeedge with one Al(9)YbPt4 tetrahedra. In the third Al site, Al(3) is bonded to one Yb(1), one Pt(1), one Pt(4), and two equivalent Pt(3) atoms to form distorted AlYbPt4 tetrahedra that share corners with three equivalent Al(2)Pt4 tetrahedra, corners with three equivalent Al(9)YbPt4 tetrahedra,  an edgeedge with one Al(2)Pt4 tetrahedra,  an edgeedge with one Al(3)YbPt4 tetrahedra, and  an edgeedge with one Al(9)YbPt4 tetrahedra. In the fourth Al site, Al(4) is bonded in a 3-coordinate geometry to one Yb(1), one Yb(2), one Pt(1), one Pt(3), and one Pt(4) atom. In the fifth Al site, Al(5) is bonded in a 3-coordinate geometry to one Yb(1), one Yb(2), one Pt(1), one Pt(3), and one Pt(4) atom. In the sixth Al site, Al(6) is bonded in a 3-coordinate geometry to one Yb(1), one Yb(2), one Pt(1), one Pt(3), and one Pt(4) atom. In the seventh Al site, Al(7) is bonded in a 3-coordinate geometry to one Yb(1), two equivalent Yb(2), one Pt(5), and two equivalent Pt(2) atoms. In the eighth Al site, Al(8) is bonded in a 3-coordinate geometry to one Yb(1), one Yb(2), one Pt(5), and two equivalent Pt(2) atoms. In the ninth Al site, Al(9) is bonded to one Yb(2), one Pt(3), one Pt(4), and two equivalent Pt(1) atoms to form distorted AlYbPt4 tetrahedra that share corners with three equivalent Al(2)Pt4 tetrahedra, corners with three equivalent Al(3)YbPt4 tetrahedra,  an edgeedge with one Al(2)Pt4 tetrahedra,  an edgeedge with one Al(3)YbPt4 tetrahedra, and  an edgeedge with one Al(9)YbPt4 tetrahedra. In the tenth Al site, Al(10) is bonded in a 2-coordinate geometry to one Yb(1), one Yb(2), one Pt(2), and one Pt(3) atom. In the eleventh Al site, Al(11) is bonded in a 2-coordinate geometry to one Yb(1), one Yb(2), one Pt(1), and one Pt(5) atom. In the twelfth Al site, Al(12) is bonded in a 2-coordinate geometry to one Yb(1), one Yb(2), one Pt(2), and one Pt(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Yb4(Al8Pt3)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.466
_cell_length_b   7.465
_cell_length_c   13.230
_cell_angle_alpha   84.615
_cell_angle_beta   100.816
_cell_angle_gamma   119.889
_symmetry_Int_Tables_number   1
_cell_volume   627.940
_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
  Yb  Yb0  1  0.437  0.832  0.807  1.0
  Yb  Yb1  1  0.563  0.168  0.193  1.0
  Yb  Yb2  1  0.767  0.500  0.807  1.0
  Yb  Yb3  1  0.233  0.500  0.193  1.0
  Al  Al4  1  0.481  0.166  0.947  1.0
  Al  Al5  1  0.519  0.834  0.053  1.0
  Al  Al6  1  0.021  0.169  0.560  1.0
  Al  Al7  1  0.979  0.831  0.440  1.0
  Al  Al8  1  0.353  0.833  0.559  1.0
  Al  Al9  1  0.647  0.167  0.441  1.0
  Al  Al10  1  0.619  0.835  0.329  1.0
  Al  Al11  1  0.381  0.165  0.671  1.0
  Al  Al12  1  0.056  0.493  0.670  1.0
  Al  Al13  1  0.944  0.507  0.330  1.0
  Al  Al14  1  0.731  0.841  0.668  1.0
  Al  Al15  1  0.269  0.159  0.332  1.0
  Al  Al16  1  0.149  0.499  0.947  1.0
  Al  Al17  1  0.851  0.501  0.053  1.0
  Al  Al18  1  0.819  0.834  0.956  1.0
  Al  Al19  1  0.181  0.166  0.044  1.0
  Al  Al20  1  0.315  0.501  0.441  1.0
  Al  Al21  1  0.685  0.499  0.559  1.0
  Al  Al22  1  0.101  0.835  0.183  1.0
  Al  Al23  1  0.899  0.165  0.817  1.0
  Al  Al24  1  0.308  0.370  0.816  1.0
  Al  Al25  1  0.692  0.630  0.184  1.0
  Al  Al26  1  0.104  0.959  0.817  1.0
  Al  Al27  1  0.896  0.041  0.183  1.0
  Pt  Pt28  1  0.387  0.508  0.638  1.0
  Pt  Pt29  1  0.613  0.492  0.362  1.0
  Pt  Pt30  1  0.172  0.828  0.000  1.0
  Pt  Pt31  1  0.828  0.172  1.000  1.0
  Pt  Pt32  1  0.296  0.833  0.362  1.0
  Pt  Pt33  1  0.704  0.167  0.638  1.0
  Pt  Pt34  1  0.045  0.825  0.637  1.0
  Pt  Pt35  1  0.955  0.175  0.363  1.0
  Pt  Pt36  1  0.500  0.500  0.000  1.0
[/CIF]
.