The compound 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 8-coordinate geometry to one O(12), one O(2), one O(4), one O(5), one O(7), one O(8), and two equivalent O(11) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one O(10), one O(12), one O(5), one O(6), one O(9), and two equivalent O(2) atoms. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(5), one O(8), two equivalent O(4), and two equivalent O(9) atoms. Tm(1) is bonded to one O(1), one O(10), one O(12), one O(3), one O(6), one O(7), and one O(8) atom to form TmO7 pentagonal bipyramids that share  a cornercorner with one S(2)O4 tetrahedra, corners with two equivalent S(1)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 to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with two equivalent Tm(1)O7 pentagonal bipyramids. In the second S site, S(2) is bonded to one O(5), one O(6), 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(10), one O(11), one O(12), 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 2-coordinate geometry to one Rb(3), one Tm(1), and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one S(1) atom. In the third O site, O(3) is bonded in a distorted linear geometry to one Tm(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(3), and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one Rb(3), and one S(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Rb(2), one Tm(1), and one S(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Rb(1), 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(3), one Tm(1), and one S(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(3), and one S(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Rb(2), one Tm(1), and one S(3) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Rb(3), two equivalent Rb(1), and one S(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one Rb(2), one Tm(1), and one S(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3Tm(SO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.413
_cell_length_b   9.413
_cell_length_c   9.433
_cell_angle_alpha   70.760
_cell_angle_beta   70.760
_cell_angle_gamma   109.514
_symmetry_Int_Tables_number   1
_cell_volume   646.692
_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  0.350  0.314  0.621  1.0
  Rb  Rb1  1  0.314  0.350  0.121  1.0
  Rb  Rb2  1  0.795  0.663  0.023  1.0
  Rb  Rb3  1  0.663  0.795  0.523  1.0
  Rb  Rb4  1  0.445  0.952  0.855  1.0
  Rb  Rb5  1  0.952  0.445  0.355  1.0
  Tm  Tm6  1  0.163  0.842  0.504  1.0
  Tm  Tm7  1  0.842  0.163  0.004  1.0
  S  S8  1  0.453  0.744  0.237  1.0
  S  S9  1  0.744  0.453  0.737  1.0
  S  S10  1  0.522  0.137  0.356  1.0
  S  S11  1  0.137  0.522  0.856  1.0
  S  S12  1  0.958  0.073  0.644  1.0
  S  S13  1  0.073  0.958  0.144  1.0
  O  O14  1  0.926  0.593  0.599  1.0
  O  O15  1  0.593  0.926  0.099  1.0
  O  O16  1  0.528  0.654  0.322  1.0
  O  O17  1  0.654  0.528  0.822  1.0
  O  O18  1  0.315  0.751  0.368  1.0
  O  O19  1  0.751  0.315  0.868  1.0
  O  O20  1  0.657  0.376  0.655  1.0
  O  O21  1  0.376  0.657  0.155  1.0
  O  O22  1  0.593  0.311  0.337  1.0
  O  O23  1  0.311  0.593  0.837  1.0
  O  O24  1  0.667  0.108  0.273  1.0
  O  O25  1  0.108  0.667  0.773  1.0
  O  O26  1  0.404  0.111  0.280  1.0
  O  O27  1  0.111  0.404  0.780  1.0
  O  O28  1  0.407  0.996  0.542  1.0
  O  O29  1  0.996  0.407  0.042  1.0
  O  O30  1  0.793  0.026  0.641  1.0
  O  O31  1  0.026  0.793  0.141  1.0
  O  O32  1  0.007  0.933  0.646  1.0
  O  O33  1  0.933  0.007  0.146  1.0
  O  O34  1  0.101  0.241  0.493  1.0
  O  O35  1  0.241  0.101  0.993  1.0
  O  O36  1  0.074  0.936  0.309  1.0
  O  O37  1  0.936  0.074  0.809  1.0
[/CIF]
.
The compound 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 8-coordinate geometry to one O(12), one O(2), one O(4), one O(5), one O(7), one O(8), and two equivalent O(11) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one O(10), one O(12), one O(5), one O(6), one O(9), and two equivalent O(2) atoms. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(5), one O(8), two equivalent O(4), and two equivalent O(9) atoms. Tm(1) is bonded to one O(1), one O(10), one O(12), one O(3), one O(6), one O(7), and one O(8) atom to form TmO7 pentagonal bipyramids that share  a cornercorner with one S(2)O4 tetrahedra, corners with two equivalent S(1)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 to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with two equivalent Tm(1)O7 pentagonal bipyramids. In the second S site, S(2) is bonded to one O(5), one O(6), 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(10), one O(11), one O(12), 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 2-coordinate geometry to one Rb(3), one Tm(1), and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one S(1) atom. In the third O site, O(3) is bonded in a distorted linear geometry to one Tm(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(3), and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one Rb(3), and one S(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Rb(2), one Tm(1), and one S(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Rb(1), 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(3), one Tm(1), and one S(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(3), and one S(3) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Rb(2), one Tm(1), and one S(3) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Rb(3), two equivalent Rb(1), and one S(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one Rb(2), one Tm(1), and one S(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3Tm(SO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.413
_cell_length_b   9.413
_cell_length_c   9.433
_cell_angle_alpha   70.760
_cell_angle_beta   70.760
_cell_angle_gamma   109.514
_symmetry_Int_Tables_number   1
_cell_volume   646.692
_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  0.350  0.314  0.621  1.0
  Rb  Rb1  1  0.314  0.350  0.121  1.0
  Rb  Rb2  1  0.795  0.663  0.023  1.0
  Rb  Rb3  1  0.663  0.795  0.523  1.0
  Rb  Rb4  1  0.445  0.952  0.855  1.0
  Rb  Rb5  1  0.952  0.445  0.355  1.0
  Tm  Tm6  1  0.163  0.842  0.504  1.0
  Tm  Tm7  1  0.842  0.163  0.004  1.0
  S  S8  1  0.453  0.744  0.237  1.0
  S  S9  1  0.744  0.453  0.737  1.0
  S  S10  1  0.522  0.137  0.356  1.0
  S  S11  1  0.137  0.522  0.856  1.0
  S  S12  1  0.958  0.073  0.644  1.0
  S  S13  1  0.073  0.958  0.144  1.0
  O  O14  1  0.926  0.593  0.599  1.0
  O  O15  1  0.593  0.926  0.099  1.0
  O  O16  1  0.528  0.654  0.322  1.0
  O  O17  1  0.654  0.528  0.822  1.0
  O  O18  1  0.315  0.751  0.368  1.0
  O  O19  1  0.751  0.315  0.868  1.0
  O  O20  1  0.657  0.376  0.655  1.0
  O  O21  1  0.376  0.657  0.155  1.0
  O  O22  1  0.593  0.311  0.337  1.0
  O  O23  1  0.311  0.593  0.837  1.0
  O  O24  1  0.667  0.108  0.273  1.0
  O  O25  1  0.108  0.667  0.773  1.0
  O  O26  1  0.404  0.111  0.280  1.0
  O  O27  1  0.111  0.404  0.780  1.0
  O  O28  1  0.407  0.996  0.542  1.0
  O  O29  1  0.996  0.407  0.042  1.0
  O  O30  1  0.793  0.026  0.641  1.0
  O  O31  1  0.026  0.793  0.141  1.0
  O  O32  1  0.007  0.933  0.646  1.0
  O  O33  1  0.933  0.007  0.146  1.0
  O  O34  1  0.101  0.241  0.493  1.0
  O  O35  1  0.241  0.101  0.993  1.0
  O  O36  1  0.074  0.936  0.309  1.0
  O  O37  1  0.936  0.074  0.809  1.0
[/CIF]
.