The crystal structure described by Rb2Th(AsO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(6), one O(8), two equivalent O(3), and two equivalent O(5) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(1), one O(3), one O(4), one O(6), one O(7), two equivalent O(2), and two equivalent O(8) atoms. Th(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are two inequivalent As sites. In the first As site, As(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(6) atom. In the second As site, As(2) is bonded in a tetrahedral geometry to one O(4), one O(5), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), one Th(1), and one As(2) atom. In the second O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one Th(1), and one As(2) atom. In the third O site, O(6) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Th(1), and one As(1) atom. In the fourth O site, O(7) is bonded in a 3-coordinate geometry to one Rb(2), one Th(1), and one As(2) atom. In the fifth O site, O(8) is bonded in a 1-coordinate geometry to one Rb(1), two equivalent Rb(2), one Th(1), and one As(2) atom. In the sixth O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Th(1), and one As(1) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Rb(2), one Th(1), and one As(1) atom. In the eighth O site, O(3) is bonded in a 1-coordinate geometry to one Rb(2), two equivalent Rb(1), one Th(1), and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Th(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.598
_cell_length_b   8.183
_cell_length_c   10.262
_cell_angle_alpha   63.096
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   868.475
_cell_formula_units_Z   4
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
  Rb  Rb0  1  0.625  0.149  0.451  1.0
  Rb  Rb1  1  0.875  0.149  0.951  1.0
  Rb  Rb2  1  0.375  0.851  0.549  1.0
  Rb  Rb3  1  0.125  0.851  0.049  1.0
  Rb  Rb4  1  0.615  0.336  0.044  1.0
  Rb  Rb5  1  0.885  0.336  0.544  1.0
  Rb  Rb6  1  0.385  0.664  0.956  1.0
  Rb  Rb7  1  0.115  0.664  0.456  1.0
  Th  Th8  1  0.639  0.744  0.279  1.0
  Th  Th9  1  0.861  0.744  0.779  1.0
  Th  Th10  1  0.361  0.256  0.721  1.0
  Th  Th11  1  0.139  0.256  0.221  1.0
  As  As12  1  0.639  0.935  0.853  1.0
  As  As13  1  0.861  0.935  0.353  1.0
  As  As14  1  0.361  0.065  0.147  1.0
  As  As15  1  0.139  0.065  0.647  1.0
  As  As16  1  0.632  0.538  0.634  1.0
  As  As17  1  0.868  0.538  0.134  1.0
  As  As18  1  0.368  0.462  0.366  1.0
  As  As19  1  0.132  0.462  0.866  1.0
  O  O20  1  0.514  0.036  0.761  1.0
  O  O21  1  0.986  0.036  0.261  1.0
  O  O22  1  0.486  0.964  0.239  1.0
  O  O23  1  0.014  0.964  0.739  1.0
  O  O24  1  0.653  0.717  0.868  1.0
  O  O25  1  0.847  0.717  0.368  1.0
  O  O26  1  0.347  0.283  0.132  1.0
  O  O27  1  0.153  0.283  0.632  1.0
  O  O28  1  0.760  0.034  0.750  1.0
  O  O29  1  0.740  0.034  0.250  1.0
  O  O30  1  0.240  0.966  0.250  1.0
  O  O31  1  0.260  0.966  0.750  1.0
  O  O32  1  0.645  0.453  0.508  1.0
  O  O33  1  0.855  0.453  0.008  1.0
  O  O34  1  0.355  0.547  0.492  1.0
  O  O35  1  0.145  0.547  0.992  1.0
  O  O36  1  0.606  0.765  0.513  1.0
  O  O37  1  0.894  0.765  0.013  1.0
  O  O38  1  0.394  0.235  0.487  1.0
  O  O39  1  0.106  0.235  0.987  1.0
  O  O40  1  0.643  0.933  0.022  1.0
  O  O41  1  0.857  0.933  0.522  1.0
  O  O42  1  0.357  0.067  0.978  1.0
  O  O43  1  0.143  0.067  0.478  1.0
  O  O44  1  0.518  0.431  0.751  1.0
  O  O45  1  0.982  0.431  0.251  1.0
  O  O46  1  0.482  0.569  0.249  1.0
  O  O47  1  0.018  0.569  0.749  1.0
  O  O48  1  0.758  0.513  0.730  1.0
  O  O49  1  0.742  0.513  0.230  1.0
  O  O50  1  0.242  0.487  0.270  1.0
  O  O51  1  0.258  0.487  0.770  1.0
[/CIF]
.
The crystal structure described by Rb2Th(AsO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(6), one O(8), two equivalent O(3), and two equivalent O(5) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(1), one O(3), one O(4), one O(6), one O(7), two equivalent O(2), and two equivalent O(8) atoms. Th(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are two inequivalent As sites. In the first As site, As(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(6) atom. In the second As site, As(2) is bonded in a tetrahedral geometry to one O(4), one O(5), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), one Th(1), and one As(2) atom. In the second O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one Th(1), and one As(2) atom. In the third O site, O(6) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Th(1), and one As(1) atom. In the fourth O site, O(7) is bonded in a 3-coordinate geometry to one Rb(2), one Th(1), and one As(2) atom. In the fifth O site, O(8) is bonded in a 1-coordinate geometry to one Rb(1), two equivalent Rb(2), one Th(1), and one As(2) atom. In the sixth O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Th(1), and one As(1) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Rb(2), one Th(1), and one As(1) atom. In the eighth O site, O(3) is bonded in a 1-coordinate geometry to one Rb(2), two equivalent Rb(1), one Th(1), and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Th(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.598
_cell_length_b   8.183
_cell_length_c   10.262
_cell_angle_alpha   63.096
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   868.475
_cell_formula_units_Z   4
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
  Rb  Rb0  1  0.625  0.149  0.451  1.0
  Rb  Rb1  1  0.875  0.149  0.951  1.0
  Rb  Rb2  1  0.375  0.851  0.549  1.0
  Rb  Rb3  1  0.125  0.851  0.049  1.0
  Rb  Rb4  1  0.615  0.336  0.044  1.0
  Rb  Rb5  1  0.885  0.336  0.544  1.0
  Rb  Rb6  1  0.385  0.664  0.956  1.0
  Rb  Rb7  1  0.115  0.664  0.456  1.0
  Th  Th8  1  0.639  0.744  0.279  1.0
  Th  Th9  1  0.861  0.744  0.779  1.0
  Th  Th10  1  0.361  0.256  0.721  1.0
  Th  Th11  1  0.139  0.256  0.221  1.0
  As  As12  1  0.639  0.935  0.853  1.0
  As  As13  1  0.861  0.935  0.353  1.0
  As  As14  1  0.361  0.065  0.147  1.0
  As  As15  1  0.139  0.065  0.647  1.0
  As  As16  1  0.632  0.538  0.634  1.0
  As  As17  1  0.868  0.538  0.134  1.0
  As  As18  1  0.368  0.462  0.366  1.0
  As  As19  1  0.132  0.462  0.866  1.0
  O  O20  1  0.514  0.036  0.761  1.0
  O  O21  1  0.986  0.036  0.261  1.0
  O  O22  1  0.486  0.964  0.239  1.0
  O  O23  1  0.014  0.964  0.739  1.0
  O  O24  1  0.653  0.717  0.868  1.0
  O  O25  1  0.847  0.717  0.368  1.0
  O  O26  1  0.347  0.283  0.132  1.0
  O  O27  1  0.153  0.283  0.632  1.0
  O  O28  1  0.760  0.034  0.750  1.0
  O  O29  1  0.740  0.034  0.250  1.0
  O  O30  1  0.240  0.966  0.250  1.0
  O  O31  1  0.260  0.966  0.750  1.0
  O  O32  1  0.645  0.453  0.508  1.0
  O  O33  1  0.855  0.453  0.008  1.0
  O  O34  1  0.355  0.547  0.492  1.0
  O  O35  1  0.145  0.547  0.992  1.0
  O  O36  1  0.606  0.765  0.513  1.0
  O  O37  1  0.894  0.765  0.013  1.0
  O  O38  1  0.394  0.235  0.487  1.0
  O  O39  1  0.106  0.235  0.987  1.0
  O  O40  1  0.643  0.933  0.022  1.0
  O  O41  1  0.857  0.933  0.522  1.0
  O  O42  1  0.357  0.067  0.978  1.0
  O  O43  1  0.143  0.067  0.478  1.0
  O  O44  1  0.518  0.431  0.751  1.0
  O  O45  1  0.982  0.431  0.251  1.0
  O  O46  1  0.482  0.569  0.249  1.0
  O  O47  1  0.018  0.569  0.749  1.0
  O  O48  1  0.758  0.513  0.730  1.0
  O  O49  1  0.742  0.513  0.230  1.0
  O  O50  1  0.242  0.487  0.270  1.0
  O  O51  1  0.258  0.487  0.770  1.0
[/CIF]
.