The structure described by Yb5Au4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to one Au(2), two equivalent Au(1), and four equivalent Au(3) atoms to form distorted YbAu7 pentagonal bipyramids that share corners with four equivalent Yb(3)Au6 octahedra, corners with six equivalent Yb(1)Au7 pentagonal bipyramids, corners with five equivalent Yb(2)Au6 pentagonal pyramids, edges with two equivalent Yb(1)Au7 pentagonal bipyramids, edges with three equivalent Yb(2)Au6 pentagonal pyramids, faces with two equivalent Yb(3)Au6 octahedra, faces with three equivalent Yb(1)Au7 pentagonal bipyramids, and faces with three equivalent Yb(2)Au6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 45-49°. In the second Yb site, Yb(2) is bonded to one Au(1), two equivalent Au(2), and three equivalent Au(3) atoms to form distorted YbAu6 pentagonal pyramids that share corners with three equivalent Yb(3)Au6 octahedra, corners with five equivalent Yb(1)Au7 pentagonal bipyramids, corners with four equivalent Yb(2)Au6 pentagonal pyramids, edges with three equivalent Yb(1)Au7 pentagonal bipyramids, edges with three equivalent Yb(2)Au6 pentagonal pyramids, faces with two equivalent Yb(3)Au6 octahedra, faces with three equivalent Yb(1)Au7 pentagonal bipyramids, and  a faceface with one Yb(2)Au6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 38-40°. In the third Yb site, Yb(3) is bonded to two equivalent Au(1), two equivalent Au(2), and two equivalent Au(3) atoms to form YbAu6 octahedra that share corners with four equivalent Yb(3)Au6 octahedra, corners with eight equivalent Yb(1)Au7 pentagonal bipyramids, corners with six equivalent Yb(2)Au6 pentagonal pyramids, faces with four equivalent Yb(1)Au7 pentagonal bipyramids, and faces with four equivalent Yb(2)Au6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 50-52°. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a 9-coordinate geometry to two equivalent Yb(2), two equivalent Yb(3), four equivalent Yb(1), and one Au(2) atom. In the second Au site, Au(2) is bonded in a 9-coordinate geometry to two equivalent Yb(1), two equivalent Yb(3), four equivalent Yb(2), and one Au(1) atom. In the third Au site, Au(3) is bonded in a 8-coordinate geometry to one Yb(3), three equivalent Yb(2), and four equivalent Yb(1) atoms. is represented by the CIF card [CIF]
data_Yb5Au4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.614
_cell_length_b   7.774
_cell_length_c   14.689
_cell_angle_alpha   90.000
_cell_angle_beta   89.998
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   869.554
_cell_formula_units_Z   4
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  0.009  0.178  0.596  1.0
  Yb  Yb1  1  0.846  0.664  0.622  1.0
  Yb  Yb2  1  0.509  0.322  0.904  1.0
  Yb  Yb3  1  0.154  0.336  0.378  1.0
  Yb  Yb4  1  0.346  0.836  0.622  1.0
  Yb  Yb5  1  0.154  0.336  0.122  1.0
  Yb  Yb6  1  0.346  0.836  0.878  1.0
  Yb  Yb7  1  0.184  0.494  0.750  1.0
  Yb  Yb8  1  0.509  0.322  0.596  1.0
  Yb  Yb9  1  0.816  0.506  0.250  1.0
  Yb  Yb10  1  0.991  0.822  0.097  1.0
  Yb  Yb11  1  0.991  0.822  0.403  1.0
  Yb  Yb12  1  0.491  0.678  0.403  1.0
  Yb  Yb13  1  0.654  0.164  0.378  1.0
  Yb  Yb14  1  0.316  0.994  0.250  1.0
  Yb  Yb15  1  0.654  0.164  0.122  1.0
  Yb  Yb16  1  0.684  0.006  0.750  1.0
  Yb  Yb17  1  0.846  0.664  0.878  1.0
  Yb  Yb18  1  0.491  0.678  0.097  1.0
  Yb  Yb19  1  0.009  0.178  0.904  1.0
  Au  Au20  1  0.814  0.359  0.750  1.0
  Au  Au21  1  0.452  0.381  0.250  1.0
  Au  Au22  1  0.686  0.859  0.250  1.0
  Au  Au23  1  0.814  0.467  0.458  1.0
  Au  Au24  1  0.686  0.967  0.958  1.0
  Au  Au25  1  0.814  0.467  0.042  1.0
  Au  Au26  1  0.186  0.533  0.542  1.0
  Au  Au27  1  0.186  0.533  0.958  1.0
  Au  Au28  1  0.186  0.641  0.250  1.0
  Au  Au29  1  0.314  0.141  0.750  1.0
  Au  Au30  1  0.548  0.619  0.750  1.0
  Au  Au31  1  0.048  0.881  0.750  1.0
  Au  Au32  1  0.314  0.033  0.042  1.0
  Au  Au33  1  0.952  0.119  0.250  1.0
  Au  Au34  1  0.686  0.967  0.542  1.0
  Au  Au35  1  0.314  0.033  0.458  1.0
[/CIF]
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The structure described by Yb5Au4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to one Au(2), two equivalent Au(1), and four equivalent Au(3) atoms to form distorted YbAu7 pentagonal bipyramids that share corners with four equivalent Yb(3)Au6 octahedra, corners with six equivalent Yb(1)Au7 pentagonal bipyramids, corners with five equivalent Yb(2)Au6 pentagonal pyramids, edges with two equivalent Yb(1)Au7 pentagonal bipyramids, edges with three equivalent Yb(2)Au6 pentagonal pyramids, faces with two equivalent Yb(3)Au6 octahedra, faces with three equivalent Yb(1)Au7 pentagonal bipyramids, and faces with three equivalent Yb(2)Au6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 45-49°. In the second Yb site, Yb(2) is bonded to one Au(1), two equivalent Au(2), and three equivalent Au(3) atoms to form distorted YbAu6 pentagonal pyramids that share corners with three equivalent Yb(3)Au6 octahedra, corners with five equivalent Yb(1)Au7 pentagonal bipyramids, corners with four equivalent Yb(2)Au6 pentagonal pyramids, edges with three equivalent Yb(1)Au7 pentagonal bipyramids, edges with three equivalent Yb(2)Au6 pentagonal pyramids, faces with two equivalent Yb(3)Au6 octahedra, faces with three equivalent Yb(1)Au7 pentagonal bipyramids, and  a faceface with one Yb(2)Au6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 38-40°. In the third Yb site, Yb(3) is bonded to two equivalent Au(1), two equivalent Au(2), and two equivalent Au(3) atoms to form YbAu6 octahedra that share corners with four equivalent Yb(3)Au6 octahedra, corners with eight equivalent Yb(1)Au7 pentagonal bipyramids, corners with six equivalent Yb(2)Au6 pentagonal pyramids, faces with four equivalent Yb(1)Au7 pentagonal bipyramids, and faces with four equivalent Yb(2)Au6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 50-52°. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a 9-coordinate geometry to two equivalent Yb(2), two equivalent Yb(3), four equivalent Yb(1), and one Au(2) atom. In the second Au site, Au(2) is bonded in a 9-coordinate geometry to two equivalent Yb(1), two equivalent Yb(3), four equivalent Yb(2), and one Au(1) atom. In the third Au site, Au(3) is bonded in a 8-coordinate geometry to one Yb(3), three equivalent Yb(2), and four equivalent Yb(1) atoms. is represented by the CIF card [CIF]
data_Yb5Au4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.614
_cell_length_b   7.774
_cell_length_c   14.689
_cell_angle_alpha   90.000
_cell_angle_beta   89.998
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   869.554
_cell_formula_units_Z   4
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  0.009  0.178  0.596  1.0
  Yb  Yb1  1  0.846  0.664  0.622  1.0
  Yb  Yb2  1  0.509  0.322  0.904  1.0
  Yb  Yb3  1  0.154  0.336  0.378  1.0
  Yb  Yb4  1  0.346  0.836  0.622  1.0
  Yb  Yb5  1  0.154  0.336  0.122  1.0
  Yb  Yb6  1  0.346  0.836  0.878  1.0
  Yb  Yb7  1  0.184  0.494  0.750  1.0
  Yb  Yb8  1  0.509  0.322  0.596  1.0
  Yb  Yb9  1  0.816  0.506  0.250  1.0
  Yb  Yb10  1  0.991  0.822  0.097  1.0
  Yb  Yb11  1  0.991  0.822  0.403  1.0
  Yb  Yb12  1  0.491  0.678  0.403  1.0
  Yb  Yb13  1  0.654  0.164  0.378  1.0
  Yb  Yb14  1  0.316  0.994  0.250  1.0
  Yb  Yb15  1  0.654  0.164  0.122  1.0
  Yb  Yb16  1  0.684  0.006  0.750  1.0
  Yb  Yb17  1  0.846  0.664  0.878  1.0
  Yb  Yb18  1  0.491  0.678  0.097  1.0
  Yb  Yb19  1  0.009  0.178  0.904  1.0
  Au  Au20  1  0.814  0.359  0.750  1.0
  Au  Au21  1  0.452  0.381  0.250  1.0
  Au  Au22  1  0.686  0.859  0.250  1.0
  Au  Au23  1  0.814  0.467  0.458  1.0
  Au  Au24  1  0.686  0.967  0.958  1.0
  Au  Au25  1  0.814  0.467  0.042  1.0
  Au  Au26  1  0.186  0.533  0.542  1.0
  Au  Au27  1  0.186  0.533  0.958  1.0
  Au  Au28  1  0.186  0.641  0.250  1.0
  Au  Au29  1  0.314  0.141  0.750  1.0
  Au  Au30  1  0.548  0.619  0.750  1.0
  Au  Au31  1  0.048  0.881  0.750  1.0
  Au  Au32  1  0.314  0.033  0.042  1.0
  Au  Au33  1  0.952  0.119  0.250  1.0
  Au  Au34  1  0.686  0.967  0.542  1.0
  Au  Au35  1  0.314  0.033  0.458  1.0
[/CIF]
.