The crystal structure described by Eu2(Au2Al)3 crystallizes in the trigonal R-3c space group. Eu(1) is bonded in a 9-coordinate geometry to twelve equivalent Au(1) atoms. Au(1) is bonded in a 11-coordinate geometry to four equivalent Eu(1), four equivalent Au(1), and three equivalent Al(1) atoms. Al(1) is bonded in a 6-coordinate geometry to six equivalent Au(1) atoms. is represented by the CIF file [CIF]
data_Eu2(AlAu2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.836
_cell_length_b   8.836
_cell_length_c   8.836
_cell_angle_alpha   57.392
_cell_angle_beta   57.392
_cell_angle_gamma   57.392
_symmetry_Int_Tables_number   1
_cell_volume   458.470
_cell_formula_units_Z   2
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
  Eu  Eu0  1  0.911  0.911  0.911  1.0
  Eu  Eu1  1  0.411  0.411  0.411  1.0
  Eu  Eu2  1  0.089  0.089  0.089  1.0
  Eu  Eu3  1  0.589  0.589  0.589  1.0
  Al  Al4  1  0.553  0.750  0.947  1.0
  Al  Al5  1  0.947  0.553  0.750  1.0
  Al  Al6  1  0.750  0.947  0.553  1.0
  Al  Al7  1  0.447  0.250  0.053  1.0
  Al  Al8  1  0.053  0.447  0.250  1.0
  Al  Al9  1  0.250  0.053  0.447  1.0
  Au  Au10  1  0.476  0.868  0.203  1.0
  Au  Au11  1  0.203  0.476  0.868  1.0
  Au  Au12  1  0.868  0.203  0.476  1.0
  Au  Au13  1  0.703  0.368  0.976  1.0
  Au  Au14  1  0.976  0.703  0.368  1.0
  Au  Au15  1  0.368  0.976  0.703  1.0
  Au  Au16  1  0.524  0.132  0.797  1.0
  Au  Au17  1  0.797  0.524  0.132  1.0
  Au  Au18  1  0.132  0.797  0.524  1.0
  Au  Au19  1  0.297  0.632  0.024  1.0
  Au  Au20  1  0.024  0.297  0.632  1.0
  Au  Au21  1  0.632  0.024  0.297  1.0
[/CIF]
.
The crystal structure described by Eu2(Au2Al)3 crystallizes in the trigonal R-3c space group. Eu(1) is bonded in a 9-coordinate geometry to twelve equivalent Au(1) atoms. Au(1) is bonded in a 11-coordinate geometry to four equivalent Eu(1), four equivalent Au(1), and three equivalent Al(1) atoms. Al(1) is bonded in a 6-coordinate geometry to six equivalent Au(1) atoms. is represented by the CIF file [CIF]
data_Eu2(AlAu2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.836
_cell_length_b   8.836
_cell_length_c   8.836
_cell_angle_alpha   57.392
_cell_angle_beta   57.392
_cell_angle_gamma   57.392
_symmetry_Int_Tables_number   1
_cell_volume   458.470
_cell_formula_units_Z   2
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
  Eu  Eu0  1  0.911  0.911  0.911  1.0
  Eu  Eu1  1  0.411  0.411  0.411  1.0
  Eu  Eu2  1  0.089  0.089  0.089  1.0
  Eu  Eu3  1  0.589  0.589  0.589  1.0
  Al  Al4  1  0.553  0.750  0.947  1.0
  Al  Al5  1  0.947  0.553  0.750  1.0
  Al  Al6  1  0.750  0.947  0.553  1.0
  Al  Al7  1  0.447  0.250  0.053  1.0
  Al  Al8  1  0.053  0.447  0.250  1.0
  Al  Al9  1  0.250  0.053  0.447  1.0
  Au  Au10  1  0.476  0.868  0.203  1.0
  Au  Au11  1  0.203  0.476  0.868  1.0
  Au  Au12  1  0.868  0.203  0.476  1.0
  Au  Au13  1  0.703  0.368  0.976  1.0
  Au  Au14  1  0.976  0.703  0.368  1.0
  Au  Au15  1  0.368  0.976  0.703  1.0
  Au  Au16  1  0.524  0.132  0.797  1.0
  Au  Au17  1  0.797  0.524  0.132  1.0
  Au  Au18  1  0.132  0.797  0.524  1.0
  Au  Au19  1  0.297  0.632  0.024  1.0
  Au  Au20  1  0.024  0.297  0.632  1.0
  Au  Au21  1  0.632  0.024  0.297  1.0
[/CIF]
.