The structure described by ErGdAl6 crystallizes in the hexagonal P6_3/mmc space group. Er(1) is bonded to six equivalent Al(1) and six equivalent Al(2) atoms to form ErAl12 cuboctahedra that share corners with twelve equivalent Er(1)Al12 cuboctahedra, edges with twelve equivalent Al(2)Gd2Er2Al8 cuboctahedra, faces with six equivalent Gd(1)Al12 cuboctahedra, and faces with six equivalent Al(2)Gd2Er2Al8 cuboctahedra. Gd(1) is bonded to six equivalent Al(1) and six equivalent Al(2) atoms to form GdAl12 cuboctahedra that share corners with six equivalent Gd(1)Al12 cuboctahedra, corners with twelve equivalent Al(2)Gd2Er2Al8 cuboctahedra, edges with six equivalent Al(2)Gd2Er2Al8 cuboctahedra, faces with two equivalent Gd(1)Al12 cuboctahedra, faces with six equivalent Er(1)Al12 cuboctahedra, and faces with six equivalent Al(2)Gd2Er2Al8 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(2) is bonded to two equivalent Er(1), two equivalent Gd(1), four equivalent Al(1), and four equivalent Al(2) atoms to form distorted AlGd2Er2Al8 cuboctahedra that share corners with four equivalent Gd(1)Al12 cuboctahedra, corners with fourteen equivalent Al(2)Gd2Er2Al8 cuboctahedra, edges with two equivalent Gd(1)Al12 cuboctahedra, edges with four equivalent Er(1)Al12 cuboctahedra, edges with four equivalent Al(2)Gd2Er2Al8 cuboctahedra, faces with two equivalent Er(1)Al12 cuboctahedra, faces with two equivalent Gd(1)Al12 cuboctahedra, and faces with six equivalent Al(2)Gd2Er2Al8 cuboctahedra. In the second Al site, Al(1) is bonded in a 10-coordinate geometry to two equivalent Er(1), two equivalent Gd(1), two equivalent Al(1), and four equivalent Al(2) atoms. is represented by the CIF card [CIF]
data_GdErAl6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.089
_cell_length_b   6.089
_cell_length_c   9.482
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   304.466
_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
  Gd  Gd0  1  0.000  0.000  0.000  1.0
  Gd  Gd1  1  0.000  0.000  0.500  1.0
  Er  Er2  1  0.333  0.667  0.750  1.0
  Er  Er3  1  0.667  0.333  0.250  1.0
  Al  Al4  1  0.816  0.633  0.750  1.0
  Al  Al5  1  0.367  0.184  0.750  1.0
  Al  Al6  1  0.816  0.184  0.750  1.0
  Al  Al7  1  0.184  0.367  0.250  1.0
  Al  Al8  1  0.633  0.816  0.250  1.0
  Al  Al9  1  0.184  0.816  0.250  1.0
  Al  Al10  1  0.500  0.500  0.000  1.0
  Al  Al11  1  0.500  0.000  0.000  1.0
  Al  Al12  1  0.000  0.500  0.000  1.0
  Al  Al13  1  0.500  0.500  0.500  1.0
  Al  Al14  1  0.500  0.000  0.500  1.0
  Al  Al15  1  0.000  0.500  0.500  1.0
[/CIF]
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The structure described by ErGdAl6 crystallizes in the hexagonal P6_3/mmc space group. Er(1) is bonded to six equivalent Al(1) and six equivalent Al(2) atoms to form ErAl12 cuboctahedra that share corners with twelve equivalent Er(1)Al12 cuboctahedra, edges with twelve equivalent Al(2)Gd2Er2Al8 cuboctahedra, faces with six equivalent Gd(1)Al12 cuboctahedra, and faces with six equivalent Al(2)Gd2Er2Al8 cuboctahedra. Gd(1) is bonded to six equivalent Al(1) and six equivalent Al(2) atoms to form GdAl12 cuboctahedra that share corners with six equivalent Gd(1)Al12 cuboctahedra, corners with twelve equivalent Al(2)Gd2Er2Al8 cuboctahedra, edges with six equivalent Al(2)Gd2Er2Al8 cuboctahedra, faces with two equivalent Gd(1)Al12 cuboctahedra, faces with six equivalent Er(1)Al12 cuboctahedra, and faces with six equivalent Al(2)Gd2Er2Al8 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(2) is bonded to two equivalent Er(1), two equivalent Gd(1), four equivalent Al(1), and four equivalent Al(2) atoms to form distorted AlGd2Er2Al8 cuboctahedra that share corners with four equivalent Gd(1)Al12 cuboctahedra, corners with fourteen equivalent Al(2)Gd2Er2Al8 cuboctahedra, edges with two equivalent Gd(1)Al12 cuboctahedra, edges with four equivalent Er(1)Al12 cuboctahedra, edges with four equivalent Al(2)Gd2Er2Al8 cuboctahedra, faces with two equivalent Er(1)Al12 cuboctahedra, faces with two equivalent Gd(1)Al12 cuboctahedra, and faces with six equivalent Al(2)Gd2Er2Al8 cuboctahedra. In the second Al site, Al(1) is bonded in a 10-coordinate geometry to two equivalent Er(1), two equivalent Gd(1), two equivalent Al(1), and four equivalent Al(2) atoms. is represented by the CIF card [CIF]
data_GdErAl6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.089
_cell_length_b   6.089
_cell_length_c   9.482
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   304.466
_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
  Gd  Gd0  1  0.000  0.000  0.000  1.0
  Gd  Gd1  1  0.000  0.000  0.500  1.0
  Er  Er2  1  0.333  0.667  0.750  1.0
  Er  Er3  1  0.667  0.333  0.250  1.0
  Al  Al4  1  0.816  0.633  0.750  1.0
  Al  Al5  1  0.367  0.184  0.750  1.0
  Al  Al6  1  0.816  0.184  0.750  1.0
  Al  Al7  1  0.184  0.367  0.250  1.0
  Al  Al8  1  0.633  0.816  0.250  1.0
  Al  Al9  1  0.184  0.816  0.250  1.0
  Al  Al10  1  0.500  0.500  0.000  1.0
  Al  Al11  1  0.500  0.000  0.000  1.0
  Al  Al12  1  0.000  0.500  0.000  1.0
  Al  Al13  1  0.500  0.500  0.500  1.0
  Al  Al14  1  0.500  0.000  0.500  1.0
  Al  Al15  1  0.000  0.500  0.500  1.0
[/CIF]
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