The crystal structure described by CsEr(WO4)2 crystallizes in the monoclinic C2/c space group. Cs(1) is bonded in a 12-coordinate geometry to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms. Er(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) 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 corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 40°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Cs(1) and two equivalent W(1) atoms. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cs(1), one Er(1), and one W(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Cs(1), one Er(1), and two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Cs(1), one Er(1), and one W(1) atom. is represented by the CIF card [CIF]
data_CsEr(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.663
_cell_length_b   7.663
_cell_length_c   7.539
_cell_angle_alpha   62.590
_cell_angle_beta   62.590
_cell_angle_gamma   88.545
_symmetry_Int_Tables_number   1
_cell_volume   338.974
_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
  Cs  Cs0  1  0.197  0.803  0.750  1.0
  Cs  Cs1  1  0.803  0.197  0.250  1.0
  Er  Er2  1  0.778  0.222  0.750  1.0
  Er  Er3  1  0.222  0.778  0.250  1.0
  W  W4  1  0.699  0.687  0.786  1.0
  W  W5  1  0.301  0.313  0.214  1.0
  W  W6  1  0.313  0.301  0.714  1.0
  W  W7  1  0.687  0.699  0.286  1.0
  O  O8  1  0.621  0.748  0.565  1.0
  O  O9  1  0.379  0.252  0.435  1.0
  O  O10  1  0.252  0.379  0.935  1.0
  O  O11  1  0.748  0.621  0.065  1.0
  O  O12  1  0.368  0.059  0.878  1.0
  O  O13  1  0.632  0.941  0.122  1.0
  O  O14  1  0.941  0.632  0.622  1.0
  O  O15  1  0.059  0.368  0.378  1.0
  O  O16  1  0.593  0.372  0.962  1.0
  O  O17  1  0.407  0.628  0.038  1.0
  O  O18  1  0.628  0.407  0.538  1.0
  O  O19  1  0.372  0.593  0.462  1.0
  O  O20  1  0.778  0.951  0.702  1.0
  O  O21  1  0.222  0.049  0.298  1.0
  O  O22  1  0.049  0.222  0.798  1.0
  O  O23  1  0.951  0.778  0.202  1.0
[/CIF]
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The crystal structure described by CsEr(WO4)2 crystallizes in the monoclinic C2/c space group. Cs(1) is bonded in a 12-coordinate geometry to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms. Er(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) 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 corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles are 40°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Cs(1) and two equivalent W(1) atoms. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cs(1), one Er(1), and one W(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Cs(1), one Er(1), and two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Cs(1), one Er(1), and one W(1) atom. is represented by the CIF card [CIF]
data_CsEr(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.663
_cell_length_b   7.663
_cell_length_c   7.539
_cell_angle_alpha   62.590
_cell_angle_beta   62.590
_cell_angle_gamma   88.545
_symmetry_Int_Tables_number   1
_cell_volume   338.974
_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
  Cs  Cs0  1  0.197  0.803  0.750  1.0
  Cs  Cs1  1  0.803  0.197  0.250  1.0
  Er  Er2  1  0.778  0.222  0.750  1.0
  Er  Er3  1  0.222  0.778  0.250  1.0
  W  W4  1  0.699  0.687  0.786  1.0
  W  W5  1  0.301  0.313  0.214  1.0
  W  W6  1  0.313  0.301  0.714  1.0
  W  W7  1  0.687  0.699  0.286  1.0
  O  O8  1  0.621  0.748  0.565  1.0
  O  O9  1  0.379  0.252  0.435  1.0
  O  O10  1  0.252  0.379  0.935  1.0
  O  O11  1  0.748  0.621  0.065  1.0
  O  O12  1  0.368  0.059  0.878  1.0
  O  O13  1  0.632  0.941  0.122  1.0
  O  O14  1  0.941  0.632  0.622  1.0
  O  O15  1  0.059  0.368  0.378  1.0
  O  O16  1  0.593  0.372  0.962  1.0
  O  O17  1  0.407  0.628  0.038  1.0
  O  O18  1  0.628  0.407  0.538  1.0
  O  O19  1  0.372  0.593  0.462  1.0
  O  O20  1  0.778  0.951  0.702  1.0
  O  O21  1  0.222  0.049  0.298  1.0
  O  O22  1  0.049  0.222  0.798  1.0
  O  O23  1  0.951  0.778  0.202  1.0
[/CIF]
.