The structure described by Cs2Th(AsO4)2 crystallizes in the tetragonal I4_1/amd space group. Cs(1) is bonded to four equivalent O(2) atoms to form distorted CsO4 hexagonal bipyramids that share corners with four equivalent Th(1)O8 hexagonal bipyramids, corners with four equivalent As(1)O4 tetrahedra, and edges with two equivalent Cs(1)O4 hexagonal bipyramids. Th(1) is bonded to four equivalent O(1) and four equivalent O(2) atoms to form distorted ThO8 hexagonal bipyramids that share corners with eight equivalent Cs(1)O4 hexagonal bipyramids, corners with four equivalent As(1)O4 tetrahedra, and edges with two equivalent As(1)O4 tetrahedra. As(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form AsO4 tetrahedra that share corners with two equivalent Th(1)O8 hexagonal bipyramids, corners with four equivalent Cs(1)O4 hexagonal bipyramids, and  an edgeedge with one Th(1)O8 hexagonal bipyramid. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Th(1) and one As(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Cs(1), one Th(1), and one As(1) atom. is represented by the CIF file [CIF]
data_Cs2Th(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.790
_cell_length_b   10.790
_cell_length_c   10.790
_cell_angle_alpha   139.728
_cell_angle_beta   139.728
_cell_angle_gamma   58.266
_symmetry_Int_Tables_number   1
_cell_volume   520.194
_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  0.875  0.625  0.750  1.0
  Cs  Cs1  1  0.375  0.125  0.250  1.0
  Cs  Cs2  1  0.875  0.125  0.750  1.0
  Cs  Cs3  1  0.875  0.125  0.250  1.0
  Th  Th4  1  0.500  0.500  0.000  1.0
  Th  Th5  1  0.250  0.750  0.500  1.0
  As  As6  1  0.326  0.326  0.000  1.0
  As  As7  1  0.076  0.576  0.500  1.0
  As  As8  1  0.424  0.924  0.500  1.0
  As  As9  1  0.674  0.674  0.000  1.0
  O  O10  1  0.271  0.456  0.185  1.0
  O  O11  1  0.206  0.521  0.685  1.0
  O  O12  1  0.836  0.521  0.315  1.0
  O  O13  1  0.271  0.086  0.815  1.0
  O  O14  1  0.479  0.794  0.315  1.0
  O  O15  1  0.544  0.729  0.815  1.0
  O  O16  1  0.914  0.729  0.185  1.0
  O  O17  1  0.479  0.164  0.685  1.0
  O  O18  1  0.206  0.384  0.822  1.0
  O  O19  1  0.563  0.384  0.178  1.0
  O  O20  1  0.134  0.456  0.322  1.0
  O  O21  1  0.134  0.813  0.678  1.0
  O  O22  1  0.544  0.866  0.678  1.0
  O  O23  1  0.187  0.866  0.322  1.0
  O  O24  1  0.616  0.794  0.178  1.0
  O  O25  1  0.616  0.437  0.822  1.0
[/CIF]
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The structure described by Cs2Th(AsO4)2 crystallizes in the tetragonal I4_1/amd space group. Cs(1) is bonded to four equivalent O(2) atoms to form distorted CsO4 hexagonal bipyramids that share corners with four equivalent Th(1)O8 hexagonal bipyramids, corners with four equivalent As(1)O4 tetrahedra, and edges with two equivalent Cs(1)O4 hexagonal bipyramids. Th(1) is bonded to four equivalent O(1) and four equivalent O(2) atoms to form distorted ThO8 hexagonal bipyramids that share corners with eight equivalent Cs(1)O4 hexagonal bipyramids, corners with four equivalent As(1)O4 tetrahedra, and edges with two equivalent As(1)O4 tetrahedra. As(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form AsO4 tetrahedra that share corners with two equivalent Th(1)O8 hexagonal bipyramids, corners with four equivalent Cs(1)O4 hexagonal bipyramids, and  an edgeedge with one Th(1)O8 hexagonal bipyramid. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Th(1) and one As(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Cs(1), one Th(1), and one As(1) atom. is represented by the CIF file [CIF]
data_Cs2Th(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.790
_cell_length_b   10.790
_cell_length_c   10.790
_cell_angle_alpha   139.728
_cell_angle_beta   139.728
_cell_angle_gamma   58.266
_symmetry_Int_Tables_number   1
_cell_volume   520.194
_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  0.875  0.625  0.750  1.0
  Cs  Cs1  1  0.375  0.125  0.250  1.0
  Cs  Cs2  1  0.875  0.125  0.750  1.0
  Cs  Cs3  1  0.875  0.125  0.250  1.0
  Th  Th4  1  0.500  0.500  0.000  1.0
  Th  Th5  1  0.250  0.750  0.500  1.0
  As  As6  1  0.326  0.326  0.000  1.0
  As  As7  1  0.076  0.576  0.500  1.0
  As  As8  1  0.424  0.924  0.500  1.0
  As  As9  1  0.674  0.674  0.000  1.0
  O  O10  1  0.271  0.456  0.185  1.0
  O  O11  1  0.206  0.521  0.685  1.0
  O  O12  1  0.836  0.521  0.315  1.0
  O  O13  1  0.271  0.086  0.815  1.0
  O  O14  1  0.479  0.794  0.315  1.0
  O  O15  1  0.544  0.729  0.815  1.0
  O  O16  1  0.914  0.729  0.185  1.0
  O  O17  1  0.479  0.164  0.685  1.0
  O  O18  1  0.206  0.384  0.822  1.0
  O  O19  1  0.563  0.384  0.178  1.0
  O  O20  1  0.134  0.456  0.322  1.0
  O  O21  1  0.134  0.813  0.678  1.0
  O  O22  1  0.544  0.866  0.678  1.0
  O  O23  1  0.187  0.866  0.322  1.0
  O  O24  1  0.616  0.794  0.178  1.0
  O  O25  1  0.616  0.437  0.822  1.0
[/CIF]
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