The material structure described by Rb3Tm(SO4)3 crystallizes in the monoclinic Cc space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(3), one O(8), and two equivalent O(2) atoms. In the second Rb site, Rb(2) is bonded in a 8-coordinate geometry to one O(2), one O(4), one O(6), one O(7), one O(8), one O(9), and two equivalent O(3) atoms. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one S(1), one O(1), one O(11), one O(12), one O(4), one O(9), and two equivalent O(6) atoms. Tm(1) is bonded to one O(1), one O(10), one O(12), one O(5), one O(7), one O(8), and one O(9) atom to form TmO7 pentagonal bipyramids that share  a cornercorner with one S(2)O4 tetrahedra, corners with two equivalent S(3)O4 tetrahedra, and  an edgeedge with one S(2)O4 tetrahedra. There are three inequivalent S sites. In the first S site, S(1) is bonded in a trigonal non-coplanar geometry to one Rb(3), one O(10), one O(5), and one O(6) atom. In the second S site, S(2) is bonded to one O(12), one O(4), one O(7), and one O(8) atom to form SO4 tetrahedra that share  a cornercorner with one Tm(1)O7 pentagonal bipyramid and  an edgeedge with one Tm(1)O7 pentagonal bipyramid. In the third S site, S(3) is bonded to one O(1), one O(11), one O(3), and one O(9) atom to form SO4 tetrahedra that share corners with two equivalent Tm(1)O7 pentagonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Rb(3), one Tm(1), and one S(3) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Rb(2) and two equivalent Rb(1) atoms. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one S(3) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), and one S(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Tm(1) and one S(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(3), and one S(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Rb(2), one Tm(1), and one S(2) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one Tm(1), and one S(2) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Rb(2), one Rb(3), one Tm(1), and one S(3) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Rb(1), one Tm(1), and one S(1) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(3), and one S(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one Rb(3), one Tm(1), and one S(2) atom. is represented by the CIF file [CIF]
data_Rb3Tm(SO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.554
_cell_length_b   9.554
_cell_length_c   9.515
_cell_angle_alpha   70.000
_cell_angle_beta   70.000
_cell_angle_gamma   108.385
_symmetry_Int_Tables_number   1
_cell_volume   668.717
_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
  Rb  Rb0  1  0.815  0.802  0.148  1.0
  Rb  Rb1  1  0.455  0.928  0.878  1.0
  Rb  Rb2  1  0.718  0.330  0.958  1.0
  Rb  Rb3  1  0.928  0.455  0.378  1.0
  Rb  Rb4  1  0.802  0.815  0.648  1.0
  Rb  Rb5  1  0.330  0.718  0.458  1.0
  Tm  Tm6  1  0.169  0.351  0.997  1.0
  Tm  Tm7  1  0.351  0.169  0.497  1.0
  S  S8  1  0.091  0.297  0.699  1.0
  S  S9  1  0.297  0.091  0.199  1.0
  S  S10  1  0.494  0.377  0.646  1.0
  S  S11  1  0.103  0.717  0.854  1.0
  S  S12  1  0.717  0.103  0.354  1.0
  S  S13  1  0.377  0.494  0.146  1.0
  O  O14  1  0.583  0.155  0.349  1.0
  O  O15  1  0.747  0.954  0.894  1.0
  O  O16  1  0.155  0.583  0.849  1.0
  O  O17  1  0.093  0.731  0.006  1.0
  O  O18  1  0.644  0.420  0.667  1.0
  O  O19  1  0.731  0.093  0.506  1.0
  O  O20  1  0.177  0.112  0.130  1.0
  O  O21  1  0.337  0.958  0.176  1.0
  O  O22  1  0.390  0.187  0.720  1.0
  O  O23  1  0.450  0.537  0.960  1.0
  O  O24  1  0.883  0.243  0.190  1.0
  O  O25  1  0.187  0.390  0.220  1.0
  O  O26  1  0.031  0.205  0.893  1.0
  O  O27  1  0.939  0.670  0.856  1.0
  O  O28  1  0.420  0.644  0.167  1.0
  O  O29  1  0.670  0.939  0.356  1.0
  O  O30  1  0.537  0.450  0.460  1.0
  O  O31  1  0.243  0.883  0.690  1.0
  O  O32  1  0.112  0.177  0.630  1.0
  O  O33  1  0.439  0.385  0.233  1.0
  O  O34  1  0.205  0.031  0.393  1.0
  O  O35  1  0.385  0.439  0.733  1.0
  O  O36  1  0.958  0.337  0.676  1.0
  O  O37  1  0.954  0.747  0.394  1.0
[/CIF]
.
The material structure described by Rb3Tm(SO4)3 crystallizes in the monoclinic Cc space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(3), one O(8), and two equivalent O(2) atoms. In the second Rb site, Rb(2) is bonded in a 8-coordinate geometry to one O(2), one O(4), one O(6), one O(7), one O(8), one O(9), and two equivalent O(3) atoms. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one S(1), one O(1), one O(11), one O(12), one O(4), one O(9), and two equivalent O(6) atoms. Tm(1) is bonded to one O(1), one O(10), one O(12), one O(5), one O(7), one O(8), and one O(9) atom to form TmO7 pentagonal bipyramids that share  a cornercorner with one S(2)O4 tetrahedra, corners with two equivalent S(3)O4 tetrahedra, and  an edgeedge with one S(2)O4 tetrahedra. There are three inequivalent S sites. In the first S site, S(1) is bonded in a trigonal non-coplanar geometry to one Rb(3), one O(10), one O(5), and one O(6) atom. In the second S site, S(2) is bonded to one O(12), one O(4), one O(7), and one O(8) atom to form SO4 tetrahedra that share  a cornercorner with one Tm(1)O7 pentagonal bipyramid and  an edgeedge with one Tm(1)O7 pentagonal bipyramid. In the third S site, S(3) is bonded to one O(1), one O(11), one O(3), and one O(9) atom to form SO4 tetrahedra that share corners with two equivalent Tm(1)O7 pentagonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Rb(3), one Tm(1), and one S(3) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Rb(2) and two equivalent Rb(1) atoms. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one S(3) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), and one S(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Tm(1) and one S(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(3), and one S(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Rb(2), one Tm(1), and one S(2) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one Tm(1), and one S(2) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Rb(2), one Rb(3), one Tm(1), and one S(3) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Rb(1), one Tm(1), and one S(1) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(3), and one S(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one Rb(3), one Tm(1), and one S(2) atom. is represented by the CIF file [CIF]
data_Rb3Tm(SO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.554
_cell_length_b   9.554
_cell_length_c   9.515
_cell_angle_alpha   70.000
_cell_angle_beta   70.000
_cell_angle_gamma   108.385
_symmetry_Int_Tables_number   1
_cell_volume   668.717
_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
  Rb  Rb0  1  0.815  0.802  0.148  1.0
  Rb  Rb1  1  0.455  0.928  0.878  1.0
  Rb  Rb2  1  0.718  0.330  0.958  1.0
  Rb  Rb3  1  0.928  0.455  0.378  1.0
  Rb  Rb4  1  0.802  0.815  0.648  1.0
  Rb  Rb5  1  0.330  0.718  0.458  1.0
  Tm  Tm6  1  0.169  0.351  0.997  1.0
  Tm  Tm7  1  0.351  0.169  0.497  1.0
  S  S8  1  0.091  0.297  0.699  1.0
  S  S9  1  0.297  0.091  0.199  1.0
  S  S10  1  0.494  0.377  0.646  1.0
  S  S11  1  0.103  0.717  0.854  1.0
  S  S12  1  0.717  0.103  0.354  1.0
  S  S13  1  0.377  0.494  0.146  1.0
  O  O14  1  0.583  0.155  0.349  1.0
  O  O15  1  0.747  0.954  0.894  1.0
  O  O16  1  0.155  0.583  0.849  1.0
  O  O17  1  0.093  0.731  0.006  1.0
  O  O18  1  0.644  0.420  0.667  1.0
  O  O19  1  0.731  0.093  0.506  1.0
  O  O20  1  0.177  0.112  0.130  1.0
  O  O21  1  0.337  0.958  0.176  1.0
  O  O22  1  0.390  0.187  0.720  1.0
  O  O23  1  0.450  0.537  0.960  1.0
  O  O24  1  0.883  0.243  0.190  1.0
  O  O25  1  0.187  0.390  0.220  1.0
  O  O26  1  0.031  0.205  0.893  1.0
  O  O27  1  0.939  0.670  0.856  1.0
  O  O28  1  0.420  0.644  0.167  1.0
  O  O29  1  0.670  0.939  0.356  1.0
  O  O30  1  0.537  0.450  0.460  1.0
  O  O31  1  0.243  0.883  0.690  1.0
  O  O32  1  0.112  0.177  0.630  1.0
  O  O33  1  0.439  0.385  0.233  1.0
  O  O34  1  0.205  0.031  0.393  1.0
  O  O35  1  0.385  0.439  0.733  1.0
  O  O36  1  0.958  0.337  0.676  1.0
  O  O37  1  0.954  0.747  0.394  1.0
[/CIF]
.