The structure described by ErTl(WO4)2 crystallizes in the monoclinic C2/c space group. Er(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), and four equivalent O(2) atoms. W(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form a mixture of distorted corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 44°. Tl(1) is bonded in a 2-coordinate geometry to two equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to two equivalent W(1) and one Tl(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one W(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Er(1) and two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Er(1) and one W(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErTl(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.465
_cell_length_b   7.465
_cell_length_c   7.479
_cell_angle_alpha   62.205
_cell_angle_beta   62.205
_cell_angle_gamma   88.492
_symmetry_Int_Tables_number   1
_cell_volume   316.243
_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  0.773  0.227  0.750  1.0
  Er  Er1  1  0.227  0.773  0.250  1.0
  Tl  Tl2  1  0.207  0.793  0.750  1.0
  Tl  Tl3  1  0.793  0.207  0.250  1.0
  W  W4  1  0.699  0.695  0.770  1.0
  W  W5  1  0.301  0.305  0.230  1.0
  W  W6  1  0.305  0.301  0.730  1.0
  W  W7  1  0.695  0.699  0.270  1.0
  O  O8  1  0.618  0.762  0.557  1.0
  O  O9  1  0.382  0.238  0.443  1.0
  O  O10  1  0.238  0.382  0.943  1.0
  O  O11  1  0.762  0.618  0.057  1.0
  O  O12  1  0.378  0.063  0.877  1.0
  O  O13  1  0.622  0.937  0.123  1.0
  O  O14  1  0.937  0.622  0.623  1.0
  O  O15  1  0.063  0.378  0.377  1.0
  O  O16  1  0.587  0.369  0.967  1.0
  O  O17  1  0.413  0.631  0.033  1.0
  O  O18  1  0.631  0.413  0.533  1.0
  O  O19  1  0.369  0.587  0.467  1.0
  O  O20  1  0.787  0.957  0.692  1.0
  O  O21  1  0.213  0.043  0.308  1.0
  O  O22  1  0.043  0.213  0.808  1.0
  O  O23  1  0.957  0.787  0.192  1.0
[/CIF]
.
The structure described by ErTl(WO4)2 crystallizes in the monoclinic C2/c space group. Er(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), and four equivalent O(2) atoms. W(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form a mixture of distorted corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 44°. Tl(1) is bonded in a 2-coordinate geometry to two equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to two equivalent W(1) and one Tl(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Er(1) and one W(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Er(1) and two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Er(1) and one W(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErTl(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.465
_cell_length_b   7.465
_cell_length_c   7.479
_cell_angle_alpha   62.205
_cell_angle_beta   62.205
_cell_angle_gamma   88.492
_symmetry_Int_Tables_number   1
_cell_volume   316.243
_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  0.773  0.227  0.750  1.0
  Er  Er1  1  0.227  0.773  0.250  1.0
  Tl  Tl2  1  0.207  0.793  0.750  1.0
  Tl  Tl3  1  0.793  0.207  0.250  1.0
  W  W4  1  0.699  0.695  0.770  1.0
  W  W5  1  0.301  0.305  0.230  1.0
  W  W6  1  0.305  0.301  0.730  1.0
  W  W7  1  0.695  0.699  0.270  1.0
  O  O8  1  0.618  0.762  0.557  1.0
  O  O9  1  0.382  0.238  0.443  1.0
  O  O10  1  0.238  0.382  0.943  1.0
  O  O11  1  0.762  0.618  0.057  1.0
  O  O12  1  0.378  0.063  0.877  1.0
  O  O13  1  0.622  0.937  0.123  1.0
  O  O14  1  0.937  0.622  0.623  1.0
  O  O15  1  0.063  0.378  0.377  1.0
  O  O16  1  0.587  0.369  0.967  1.0
  O  O17  1  0.413  0.631  0.033  1.0
  O  O18  1  0.631  0.413  0.533  1.0
  O  O19  1  0.369  0.587  0.467  1.0
  O  O20  1  0.787  0.957  0.692  1.0
  O  O21  1  0.213  0.043  0.308  1.0
  O  O22  1  0.043  0.213  0.808  1.0
  O  O23  1  0.957  0.787  0.192  1.0
[/CIF]
.