The structure described by Au3Er is beta Cu3Ti structured and crystallizes in the orthorhombic Pmmn space group. Er(1) is bonded to four equivalent Au(2) and eight equivalent Au(1) atoms to form a mixture of corner, edge, and face-sharing ErAu12 cuboctahedra. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a 4-coordinate geometry to four equivalent Er(1) atoms. In the second Au site, Au(2) is bonded in a distorted see-saw-like geometry to four equivalent Er(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErAu3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.967
_cell_length_b   5.095
_cell_length_c   6.125
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   155.016
_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
  Er  Er0  1  0.750  0.346  0.750  1.0
  Er  Er1  1  0.250  0.654  0.250  1.0
  Au  Au2  1  0.750  0.839  0.006  1.0
  Au  Au3  1  0.750  0.839  0.494  1.0
  Au  Au4  1  0.250  0.161  0.994  1.0
  Au  Au5  1  0.250  0.161  0.506  1.0
  Au  Au6  1  0.250  0.665  0.750  1.0
  Au  Au7  1  0.750  0.335  0.250  1.0
[/CIF]
.
The structure described by Au3Er is beta Cu3Ti structured and crystallizes in the orthorhombic Pmmn space group. Er(1) is bonded to four equivalent Au(2) and eight equivalent Au(1) atoms to form a mixture of corner, edge, and face-sharing ErAu12 cuboctahedra. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a 4-coordinate geometry to four equivalent Er(1) atoms. In the second Au site, Au(2) is bonded in a distorted see-saw-like geometry to four equivalent Er(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErAu3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.967
_cell_length_b   5.095
_cell_length_c   6.125
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   155.016
_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
  Er  Er0  1  0.750  0.346  0.750  1.0
  Er  Er1  1  0.250  0.654  0.250  1.0
  Au  Au2  1  0.750  0.839  0.006  1.0
  Au  Au3  1  0.750  0.839  0.494  1.0
  Au  Au4  1  0.250  0.161  0.994  1.0
  Au  Au5  1  0.250  0.161  0.506  1.0
  Au  Au6  1  0.250  0.665  0.750  1.0
  Au  Au7  1  0.750  0.335  0.250  1.0
[/CIF]
.