The compound described by GdAuAl4Ge2 crystallizes in the trigonal R-3m space group. Gd(1) is bonded to six equivalent Ge(1) atoms to form GdGe6 octahedra that share corners with six equivalent Al(2)Ge3Au tetrahedra, corners with six equivalent Al(1)GeAu3 tetrahedra, edges with six equivalent Gd(1)Ge6 octahedra, and edges with six equivalent Al(2)Ge3Au tetrahedra. Au(1) is bonded in a body-centered cubic geometry to two equivalent Al(2) and six equivalent Al(1) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to three equivalent Au(1) and one Ge(1) atom to form AlGeAu3 tetrahedra that share corners with three equivalent Gd(1)Ge6 octahedra, corners with three equivalent Al(2)Ge3Au tetrahedra, corners with nine equivalent Al(1)GeAu3 tetrahedra, edges with three equivalent Al(2)Ge3Au tetrahedra, and edges with three equivalent Al(1)GeAu3 tetrahedra. The corner-sharing octahedral tilt angles are 54°. In the second Al site, Al(2) is bonded to one Au(1) and three equivalent Ge(1) atoms to form AlGe3Au tetrahedra that share corners with three equivalent Gd(1)Ge6 octahedra, corners with three equivalent Al(1)GeAu3 tetrahedra, corners with seven equivalent Al(2)Ge3Au tetrahedra, edges with three equivalent Gd(1)Ge6 octahedra, and edges with three equivalent Al(1)GeAu3 tetrahedra. The corner-sharing octahedral tilt angles are 17°. Ge(1) is bonded to three equivalent Gd(1), one Al(1), and three equivalent Al(2) atoms to form a mixture of distorted edge and corner-sharing GeGd3Al4 pentagonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_GdAl4Ge2Au
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.509
_cell_length_b   11.509
_cell_length_c   11.509
_cell_angle_alpha   22.642
_cell_angle_beta   22.642
_cell_angle_gamma   22.642
_symmetry_Int_Tables_number   1
_cell_volume   198.235
_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
  Gd  Gd0  1  0.500  0.500  0.500  1.0
  Al  Al1  1  0.693  0.693  0.693  1.0
  Al  Al2  1  0.084  0.084  0.084  1.0
  Al  Al3  1  0.307  0.307  0.307  1.0
  Al  Al4  1  0.916  0.916  0.916  1.0
  Ge  Ge5  1  0.777  0.777  0.777  1.0
  Ge  Ge6  1  0.223  0.223  0.223  1.0
  Au  Au7  1  0.000  0.000  0.000  1.0
[/CIF]
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The compound described by GdAuAl4Ge2 crystallizes in the trigonal R-3m space group. Gd(1) is bonded to six equivalent Ge(1) atoms to form GdGe6 octahedra that share corners with six equivalent Al(2)Ge3Au tetrahedra, corners with six equivalent Al(1)GeAu3 tetrahedra, edges with six equivalent Gd(1)Ge6 octahedra, and edges with six equivalent Al(2)Ge3Au tetrahedra. Au(1) is bonded in a body-centered cubic geometry to two equivalent Al(2) and six equivalent Al(1) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to three equivalent Au(1) and one Ge(1) atom to form AlGeAu3 tetrahedra that share corners with three equivalent Gd(1)Ge6 octahedra, corners with three equivalent Al(2)Ge3Au tetrahedra, corners with nine equivalent Al(1)GeAu3 tetrahedra, edges with three equivalent Al(2)Ge3Au tetrahedra, and edges with three equivalent Al(1)GeAu3 tetrahedra. The corner-sharing octahedral tilt angles are 54°. In the second Al site, Al(2) is bonded to one Au(1) and three equivalent Ge(1) atoms to form AlGe3Au tetrahedra that share corners with three equivalent Gd(1)Ge6 octahedra, corners with three equivalent Al(1)GeAu3 tetrahedra, corners with seven equivalent Al(2)Ge3Au tetrahedra, edges with three equivalent Gd(1)Ge6 octahedra, and edges with three equivalent Al(1)GeAu3 tetrahedra. The corner-sharing octahedral tilt angles are 17°. Ge(1) is bonded to three equivalent Gd(1), one Al(1), and three equivalent Al(2) atoms to form a mixture of distorted edge and corner-sharing GeGd3Al4 pentagonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_GdAl4Ge2Au
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.509
_cell_length_b   11.509
_cell_length_c   11.509
_cell_angle_alpha   22.642
_cell_angle_beta   22.642
_cell_angle_gamma   22.642
_symmetry_Int_Tables_number   1
_cell_volume   198.235
_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
  Gd  Gd0  1  0.500  0.500  0.500  1.0
  Al  Al1  1  0.693  0.693  0.693  1.0
  Al  Al2  1  0.084  0.084  0.084  1.0
  Al  Al3  1  0.307  0.307  0.307  1.0
  Al  Al4  1  0.916  0.916  0.916  1.0
  Ge  Ge5  1  0.777  0.777  0.777  1.0
  Ge  Ge6  1  0.223  0.223  0.223  1.0
  Au  Au7  1  0.000  0.000  0.000  1.0
[/CIF]
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