The material described by Yb7Al5Ge8 crystallizes in the monoclinic C2/m space group. There are four inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 5-coordinate geometry to two equivalent Al(3), two equivalent Ge(4), and three equivalent Ge(2) atoms. In the second Yb site, Yb(2) is bonded in a 5-coordinate geometry to two equivalent Ge(3), two equivalent Ge(4), and three equivalent Ge(1) atoms. In the third Yb site, Yb(3) is bonded in a 11-coordinate geometry to one Al(1), two equivalent Al(2), two equivalent Al(3), two equivalent Ge(2), two equivalent Ge(3), and two equivalent Ge(4) atoms. In the fourth Yb site, Yb(4) is bonded to two equivalent Ge(1) and four equivalent Ge(3) atoms to form YbGe6 octahedra that share corners with two equivalent Al(1)YbGe4 tetrahedra and edges with two equivalent Yb(4)Ge6 octahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one Yb(3), one Ge(1), one Ge(4), and two equivalent Ge(2) atoms to form distorted AlYbGe4 tetrahedra that share  a cornercorner with one Al(3)Yb8Ge4 cuboctahedra,  a cornercorner with one Yb(4)Ge6 octahedra, corners with two equivalent Al(1)YbGe4 tetrahedra, and edges with two equivalent Al(3)Yb8Ge4 cuboctahedra. The corner-sharing octahedral tilt angles are 51°. In the second Al site, Al(2) is bonded in a 4-coordinate geometry to two equivalent Yb(3), one Ge(2), one Ge(3), and two equivalent Ge(1) atoms. In the third Al site, Al(3) is bonded to four equivalent Yb(1), four equivalent Yb(3), two equivalent Ge(2), and two equivalent Ge(4) atoms to form AlYb8Ge4 cuboctahedra that share corners with two equivalent Al(1)YbGe4 tetrahedra, edges with four equivalent Al(1)YbGe4 tetrahedra, and faces with two equivalent Al(3)Yb8Ge4 cuboctahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 7-coordinate geometry to one Yb(4), three equivalent Yb(2), one Al(1), and two equivalent Al(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Yb(3), three equivalent Yb(1), one Al(2), one Al(3), and two equivalent Al(1) atoms. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to two equivalent Yb(2), two equivalent Yb(3), two equivalent Yb(4), one Al(2), and one Ge(4) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), two equivalent Yb(3), one Al(1), one Al(3), and one Ge(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Yb7Al5Ge8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.230
_cell_length_b   8.230
_cell_length_c   12.818
_cell_angle_alpha   84.613
_cell_angle_beta   84.613
_cell_angle_gamma   29.631
_symmetry_Int_Tables_number   1
_cell_volume   427.151
_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  0.160  0.160  0.458  1.0
  Yb  Yb1  1  0.187  0.187  0.130  1.0
  Yb  Yb2  1  0.017  0.017  0.699  1.0
  Yb  Yb3  1  0.983  0.983  0.301  1.0
  Yb  Yb4  1  0.000  0.000  0.000  1.0
  Yb  Yb5  1  0.840  0.840  0.542  1.0
  Yb  Yb6  1  0.813  0.813  0.870  1.0
  Al  Al7  1  0.223  0.223  0.700  1.0
  Al  Al8  1  0.777  0.777  0.300  1.0
  Al  Al9  1  0.611  0.611  0.825  1.0
  Al  Al10  1  0.389  0.389  0.175  1.0
  Al  Al11  1  0.500  0.500  0.500  1.0
  Ge  Ge12  1  0.824  0.824  0.107  1.0
  Ge  Ge13  1  0.347  0.347  0.381  1.0
  Ge  Ge14  1  0.176  0.176  0.893  1.0
  Ge  Ge15  1  0.448  0.448  0.855  1.0
  Ge  Ge16  1  0.552  0.552  0.145  1.0
  Ge  Ge17  1  0.386  0.386  0.684  1.0
  Ge  Ge18  1  0.614  0.614  0.316  1.0
  Ge  Ge19  1  0.653  0.653  0.619  1.0
[/CIF]
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The material described by Yb7Al5Ge8 crystallizes in the monoclinic C2/m space group. There are four inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 5-coordinate geometry to two equivalent Al(3), two equivalent Ge(4), and three equivalent Ge(2) atoms. In the second Yb site, Yb(2) is bonded in a 5-coordinate geometry to two equivalent Ge(3), two equivalent Ge(4), and three equivalent Ge(1) atoms. In the third Yb site, Yb(3) is bonded in a 11-coordinate geometry to one Al(1), two equivalent Al(2), two equivalent Al(3), two equivalent Ge(2), two equivalent Ge(3), and two equivalent Ge(4) atoms. In the fourth Yb site, Yb(4) is bonded to two equivalent Ge(1) and four equivalent Ge(3) atoms to form YbGe6 octahedra that share corners with two equivalent Al(1)YbGe4 tetrahedra and edges with two equivalent Yb(4)Ge6 octahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to one Yb(3), one Ge(1), one Ge(4), and two equivalent Ge(2) atoms to form distorted AlYbGe4 tetrahedra that share  a cornercorner with one Al(3)Yb8Ge4 cuboctahedra,  a cornercorner with one Yb(4)Ge6 octahedra, corners with two equivalent Al(1)YbGe4 tetrahedra, and edges with two equivalent Al(3)Yb8Ge4 cuboctahedra. The corner-sharing octahedral tilt angles are 51°. In the second Al site, Al(2) is bonded in a 4-coordinate geometry to two equivalent Yb(3), one Ge(2), one Ge(3), and two equivalent Ge(1) atoms. In the third Al site, Al(3) is bonded to four equivalent Yb(1), four equivalent Yb(3), two equivalent Ge(2), and two equivalent Ge(4) atoms to form AlYb8Ge4 cuboctahedra that share corners with two equivalent Al(1)YbGe4 tetrahedra, edges with four equivalent Al(1)YbGe4 tetrahedra, and faces with two equivalent Al(3)Yb8Ge4 cuboctahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 7-coordinate geometry to one Yb(4), three equivalent Yb(2), one Al(1), and two equivalent Al(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Yb(3), three equivalent Yb(1), one Al(2), one Al(3), and two equivalent Al(1) atoms. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to two equivalent Yb(2), two equivalent Yb(3), two equivalent Yb(4), one Al(2), and one Ge(4) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), two equivalent Yb(3), one Al(1), one Al(3), and one Ge(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Yb7Al5Ge8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.230
_cell_length_b   8.230
_cell_length_c   12.818
_cell_angle_alpha   84.613
_cell_angle_beta   84.613
_cell_angle_gamma   29.631
_symmetry_Int_Tables_number   1
_cell_volume   427.151
_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  0.160  0.160  0.458  1.0
  Yb  Yb1  1  0.187  0.187  0.130  1.0
  Yb  Yb2  1  0.017  0.017  0.699  1.0
  Yb  Yb3  1  0.983  0.983  0.301  1.0
  Yb  Yb4  1  0.000  0.000  0.000  1.0
  Yb  Yb5  1  0.840  0.840  0.542  1.0
  Yb  Yb6  1  0.813  0.813  0.870  1.0
  Al  Al7  1  0.223  0.223  0.700  1.0
  Al  Al8  1  0.777  0.777  0.300  1.0
  Al  Al9  1  0.611  0.611  0.825  1.0
  Al  Al10  1  0.389  0.389  0.175  1.0
  Al  Al11  1  0.500  0.500  0.500  1.0
  Ge  Ge12  1  0.824  0.824  0.107  1.0
  Ge  Ge13  1  0.347  0.347  0.381  1.0
  Ge  Ge14  1  0.176  0.176  0.893  1.0
  Ge  Ge15  1  0.448  0.448  0.855  1.0
  Ge  Ge16  1  0.552  0.552  0.145  1.0
  Ge  Ge17  1  0.386  0.386  0.684  1.0
  Ge  Ge18  1  0.614  0.614  0.316  1.0
  Ge  Ge19  1  0.653  0.653  0.619  1.0
[/CIF]
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