The compound described by Yb3Er is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Yb(1) is bonded to eight equivalent Yb(1) and four equivalent Er(1) atoms to form YbYb8Er4 cuboctahedra that share corners with four equivalent Er(1)Yb12 cuboctahedra, corners with fourteen equivalent Yb(1)Yb8Er4 cuboctahedra, edges with six equivalent Er(1)Yb12 cuboctahedra, edges with twelve equivalent Yb(1)Yb8Er4 cuboctahedra, faces with four equivalent Er(1)Yb12 cuboctahedra, and faces with sixteen equivalent Yb(1)Yb8Er4 cuboctahedra. Er(1) is bonded to twelve equivalent Yb(1) atoms to form ErYb12 cuboctahedra that share corners with six equivalent Er(1)Yb12 cuboctahedra, corners with twelve equivalent Yb(1)Yb8Er4 cuboctahedra, edges with eighteen equivalent Yb(1)Yb8Er4 cuboctahedra, faces with eight equivalent Er(1)Yb12 cuboctahedra, and faces with twelve equivalent Yb(1)Yb8Er4 cuboctahedra. is represented by the CIF file [CIF]
data_Yb3Er
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.482
_cell_length_b   7.482
_cell_length_c   6.045
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   293.121
_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
  Yb  Yb0  1  0.171  0.341  0.250  1.0
  Yb  Yb1  1  0.659  0.829  0.250  1.0
  Yb  Yb2  1  0.171  0.829  0.250  1.0
  Yb  Yb3  1  0.829  0.659  0.750  1.0
  Yb  Yb4  1  0.341  0.171  0.750  1.0
  Yb  Yb5  1  0.829  0.171  0.750  1.0
  Er  Er6  1  0.333  0.667  0.750  1.0
  Er  Er7  1  0.667  0.333  0.250  1.0
[/CIF]
.
The compound described by Yb3Er is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Yb(1) is bonded to eight equivalent Yb(1) and four equivalent Er(1) atoms to form YbYb8Er4 cuboctahedra that share corners with four equivalent Er(1)Yb12 cuboctahedra, corners with fourteen equivalent Yb(1)Yb8Er4 cuboctahedra, edges with six equivalent Er(1)Yb12 cuboctahedra, edges with twelve equivalent Yb(1)Yb8Er4 cuboctahedra, faces with four equivalent Er(1)Yb12 cuboctahedra, and faces with sixteen equivalent Yb(1)Yb8Er4 cuboctahedra. Er(1) is bonded to twelve equivalent Yb(1) atoms to form ErYb12 cuboctahedra that share corners with six equivalent Er(1)Yb12 cuboctahedra, corners with twelve equivalent Yb(1)Yb8Er4 cuboctahedra, edges with eighteen equivalent Yb(1)Yb8Er4 cuboctahedra, faces with eight equivalent Er(1)Yb12 cuboctahedra, and faces with twelve equivalent Yb(1)Yb8Er4 cuboctahedra. is represented by the CIF file [CIF]
data_Yb3Er
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.482
_cell_length_b   7.482
_cell_length_c   6.045
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   293.121
_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
  Yb  Yb0  1  0.171  0.341  0.250  1.0
  Yb  Yb1  1  0.659  0.829  0.250  1.0
  Yb  Yb2  1  0.171  0.829  0.250  1.0
  Yb  Yb3  1  0.829  0.659  0.750  1.0
  Yb  Yb4  1  0.341  0.171  0.750  1.0
  Yb  Yb5  1  0.829  0.171  0.750  1.0
  Er  Er6  1  0.333  0.667  0.750  1.0
  Er  Er7  1  0.667  0.333  0.250  1.0
[/CIF]
.