The crystal structure described by Al2Ge2Y crystallizes in the trigonal P-3m1 space group. Y(1) is bonded to six equivalent Ge(1) atoms to form distorted YGe6 octahedra that share corners with twelve equivalent Al(1)Ge4 tetrahedra, edges with six equivalent Y(1)Ge6 octahedra, and edges with six equivalent Al(1)Ge4 tetrahedra. Al(1) is bonded to four equivalent Ge(1) atoms to form distorted AlGe4 tetrahedra that share corners with six equivalent Y(1)Ge6 octahedra, corners with six equivalent Al(1)Ge4 tetrahedra, edges with three equivalent Y(1)Ge6 octahedra, and edges with three equivalent Al(1)Ge4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-55°. Ge(1) is bonded to three equivalent Y(1) and four equivalent Al(1) atoms to form a mixture of distorted edge and corner-sharing GeY3Al4 pentagonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y(AlGe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.291
_cell_length_b   4.291
_cell_length_c   6.621
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   105.578
_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
  Y  Y0  1  0.000  0.000  0.000  1.0
  Al  Al1  1  0.667  0.333  0.353  1.0
  Al  Al2  1  0.333  0.667  0.647  1.0
  Ge  Ge3  1  0.667  0.333  0.741  1.0
  Ge  Ge4  1  0.333  0.667  0.259  1.0
[/CIF]
.
The crystal structure described by Al2Ge2Y crystallizes in the trigonal P-3m1 space group. Y(1) is bonded to six equivalent Ge(1) atoms to form distorted YGe6 octahedra that share corners with twelve equivalent Al(1)Ge4 tetrahedra, edges with six equivalent Y(1)Ge6 octahedra, and edges with six equivalent Al(1)Ge4 tetrahedra. Al(1) is bonded to four equivalent Ge(1) atoms to form distorted AlGe4 tetrahedra that share corners with six equivalent Y(1)Ge6 octahedra, corners with six equivalent Al(1)Ge4 tetrahedra, edges with three equivalent Y(1)Ge6 octahedra, and edges with three equivalent Al(1)Ge4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-55°. Ge(1) is bonded to three equivalent Y(1) and four equivalent Al(1) atoms to form a mixture of distorted edge and corner-sharing GeY3Al4 pentagonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y(AlGe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.291
_cell_length_b   4.291
_cell_length_c   6.621
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   105.578
_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
  Y  Y0  1  0.000  0.000  0.000  1.0
  Al  Al1  1  0.667  0.333  0.353  1.0
  Al  Al2  1  0.333  0.667  0.647  1.0
  Ge  Ge3  1  0.667  0.333  0.741  1.0
  Ge  Ge4  1  0.333  0.667  0.259  1.0
[/CIF]
.