The material described by ThLa2Ta(O2Cl)3 crystallizes in the monoclinic Pm space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(4), two equivalent O(6), one Cl(1), one Cl(2), and two equivalent Cl(6) atoms. In the second Th site, Th(2) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(4), two equivalent O(5), one Cl(2), one Cl(3), and two equivalent Cl(4) atoms. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to two equivalent O(3), two equivalent O(5), two equivalent O(6), one Cl(1), one Cl(3), and two equivalent Cl(5) atoms. In the second La site, La(2) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), one Cl(4), one Cl(5), and two equivalent Cl(3) atoms. In the third La site, La(3) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(5), one Cl(5), one Cl(6), and two equivalent Cl(1) atoms. In the fourth La site, La(4) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(6), one Cl(4), one Cl(6), and two equivalent Cl(2) atoms. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a distorted pentagonal pyramidal geometry to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. In the second Ta site, Ta(2) is bonded in a distorted pentagonal pyramidal geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Th(1), one La(2), one La(3), and one Ta(2) atom to form distorted OLa2ThTa tetrahedra that share corners with two equivalent O(2)La2ThTa tetrahedra, corners with two equivalent O(5)La2ThTa tetrahedra, corners with two equivalent O(6)La2ThTa tetrahedra, corners with two equivalent O(3)La3Ta tetrahedra, corners with two equivalent O(4)LaTh2Ta tetrahedra,  an edgeedge with one O(2)La2ThTa tetrahedra,  an edgeedge with one O(3)La3Ta tetrahedra,  an edgeedge with one O(4)LaTh2Ta tetrahedra, and edges with two equivalent O(1)La2ThTa tetrahedra. In the second O site, O(2) is bonded to one Th(2), one La(3), one La(4), and one Ta(2) atom to form distorted OLa2ThTa tetrahedra that share corners with two equivalent O(1)La2ThTa tetrahedra, corners with two equivalent O(5)La2ThTa tetrahedra, corners with two equivalent O(6)La2ThTa tetrahedra, corners with two equivalent O(3)La3Ta tetrahedra, corners with two equivalent O(4)LaTh2Ta tetrahedra,  an edgeedge with one O(1)La2ThTa tetrahedra,  an edgeedge with one O(5)La2ThTa tetrahedra,  an edgeedge with one O(3)La3Ta tetrahedra, and edges with two equivalent O(2)La2ThTa tetrahedra. In the third O site, O(3) is bonded to one La(1), one La(2), one La(4), and one Ta(2) atom to form OLa3Ta tetrahedra that share corners with two equivalent O(1)La2ThTa tetrahedra, corners with two equivalent O(2)La2ThTa tetrahedra, corners with two equivalent O(5)La2ThTa tetrahedra, corners with two equivalent O(6)La2ThTa tetrahedra, corners with two equivalent O(4)LaTh2Ta tetrahedra,  an edgeedge with one O(1)La2ThTa tetrahedra,  an edgeedge with one O(2)La2ThTa tetrahedra,  an edgeedge with one O(6)La2ThTa tetrahedra, and edges with two equivalent O(3)La3Ta tetrahedra. In the fourth O site, O(4) is bonded to one Th(1), one Th(2), one La(2), and one Ta(1) atom to form distorted OLaTh2Ta tetrahedra that share corners with two equivalent O(1)La2ThTa tetrahedra, corners with two equivalent O(2)La2ThTa tetrahedra, corners with two equivalent O(5)La2ThTa tetrahedra, corners with two equivalent O(6)La2ThTa tetrahedra, corners with two equivalent O(3)La3Ta tetrahedra,  an edgeedge with one O(1)La2ThTa tetrahedra,  an edgeedge with one O(5)La2ThTa tetrahedra,  an edgeedge with one O(6)La2ThTa tetrahedra, and edges with two equivalent O(4)LaTh2Ta tetrahedra. In the fifth O site, O(5) is bonded to one Th(2), one La(1), one La(3), and one Ta(1) atom to form distorted OLa2ThTa tetrahedra that share corners with two equivalent O(1)La2ThTa tetrahedra, corners with two equivalent O(2)La2ThTa tetrahedra, corners with two equivalent O(6)La2ThTa tetrahedra, corners with two equivalent O(3)La3Ta tetrahedra, corners with two equivalent O(4)LaTh2Ta tetrahedra,  an edgeedge with one O(2)La2ThTa tetrahedra,  an edgeedge with one O(6)La2ThTa tetrahedra,  an edgeedge with one O(4)LaTh2Ta tetrahedra, and edges with two equivalent O(5)La2ThTa tetrahedra. In the sixth O site, O(6) is bonded to one Th(1), one La(1), one La(4), and one Ta(1) atom to form distorted OLa2ThTa tetrahedra that share corners with two equivalent O(1)La2ThTa tetrahedra, corners with two equivalent O(2)La2ThTa tetrahedra, corners with two equivalent O(5)La2ThTa tetrahedra, corners with two equivalent O(3)La3Ta tetrahedra, corners with two equivalent O(4)LaTh2Ta tetrahedra,  an edgeedge with one O(5)La2ThTa tetrahedra,  an edgeedge with one O(3)La3Ta tetrahedra,  an edgeedge with one O(4)LaTh2Ta tetrahedra, and edges with two equivalent O(6)La2ThTa tetrahedra. There are six inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a see-saw-like geometry to one Th(1), one La(1), and two equivalent La(3) atoms. In the second Cl site, Cl(2) is bonded in a see-saw-like geometry to one Th(1), one Th(2), and two equivalent La(4) atoms. In the third Cl site, Cl(3) is bonded in a see-saw-like geometry to one Th(2), one La(1), and two equivalent La(2) atoms. In the fourth Cl site, Cl(4) is bonded in a see-saw-like geometry to two equivalent Th(2), one La(2), and one La(4) atom. In the fifth Cl site, Cl(5) is bonded in a see-saw-like geometry to one La(2), one La(3), and two equivalent La(1) atoms. In the sixth Cl site, Cl(6) is bonded in a see-saw-like geometry to two equivalent Th(1), one La(3), and one La(4) atom. is represented by the CIF file [CIF]
data_La2ThTa(ClO2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.484
_cell_length_b   9.404
_cell_length_c   9.436
_cell_angle_alpha   60.552
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   423.729
_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
  La  La0  1  0.000  0.322  0.083  1.0
  La  La1  1  0.500  0.408  0.690  1.0
  La  La2  1  0.500  0.908  0.406  1.0
  La  La3  1  0.500  0.683  0.911  1.0
  Th  Th4  1  0.000  0.585  0.326  1.0
  Th  Th5  1  0.000  0.083  0.586  1.0
  Ta  Ta6  1  0.500  0.335  0.333  1.0
  Ta  Ta7  1  0.000  0.667  0.666  1.0
  Cl  Cl8  1  0.000  0.946  0.239  1.0
  Cl  Cl9  1  0.000  0.812  0.952  1.0
  Cl  Cl10  1  0.000  0.235  0.807  1.0
  Cl  Cl11  1  0.500  0.053  0.756  1.0
  Cl  Cl12  1  0.500  0.189  0.054  1.0
  Cl  Cl13  1  0.500  0.759  0.191  1.0
  O  O14  1  0.231  0.635  0.517  1.0
  O  O15  1  0.231  0.848  0.634  1.0
  O  O16  1  0.236  0.524  0.838  1.0
  O  O17  1  0.741  0.366  0.477  1.0
  O  O18  1  0.738  0.156  0.370  1.0
  O  O19  1  0.739  0.480  0.163  1.0
  O  O20  1  0.259  0.366  0.477  1.0
  O  O21  1  0.262  0.156  0.370  1.0
  O  O22  1  0.261  0.480  0.163  1.0
  O  O23  1  0.769  0.635  0.517  1.0
  O  O24  1  0.769  0.848  0.634  1.0
  O  O25  1  0.764  0.524  0.838  1.0
[/CIF]
.
The material described by ThLa2Ta(O2Cl)3 crystallizes in the monoclinic Pm space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(4), two equivalent O(6), one Cl(1), one Cl(2), and two equivalent Cl(6) atoms. In the second Th site, Th(2) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(4), two equivalent O(5), one Cl(2), one Cl(3), and two equivalent Cl(4) atoms. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to two equivalent O(3), two equivalent O(5), two equivalent O(6), one Cl(1), one Cl(3), and two equivalent Cl(5) atoms. In the second La site, La(2) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), one Cl(4), one Cl(5), and two equivalent Cl(3) atoms. In the third La site, La(3) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(5), one Cl(5), one Cl(6), and two equivalent Cl(1) atoms. In the fourth La site, La(4) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(6), one Cl(4), one Cl(6), and two equivalent Cl(2) atoms. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a distorted pentagonal pyramidal geometry to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. In the second Ta site, Ta(2) is bonded in a distorted pentagonal pyramidal geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Th(1), one La(2), one La(3), and one Ta(2) atom to form distorted OLa2ThTa tetrahedra that share corners with two equivalent O(2)La2ThTa tetrahedra, corners with two equivalent O(5)La2ThTa tetrahedra, corners with two equivalent O(6)La2ThTa tetrahedra, corners with two equivalent O(3)La3Ta tetrahedra, corners with two equivalent O(4)LaTh2Ta tetrahedra,  an edgeedge with one O(2)La2ThTa tetrahedra,  an edgeedge with one O(3)La3Ta tetrahedra,  an edgeedge with one O(4)LaTh2Ta tetrahedra, and edges with two equivalent O(1)La2ThTa tetrahedra. In the second O site, O(2) is bonded to one Th(2), one La(3), one La(4), and one Ta(2) atom to form distorted OLa2ThTa tetrahedra that share corners with two equivalent O(1)La2ThTa tetrahedra, corners with two equivalent O(5)La2ThTa tetrahedra, corners with two equivalent O(6)La2ThTa tetrahedra, corners with two equivalent O(3)La3Ta tetrahedra, corners with two equivalent O(4)LaTh2Ta tetrahedra,  an edgeedge with one O(1)La2ThTa tetrahedra,  an edgeedge with one O(5)La2ThTa tetrahedra,  an edgeedge with one O(3)La3Ta tetrahedra, and edges with two equivalent O(2)La2ThTa tetrahedra. In the third O site, O(3) is bonded to one La(1), one La(2), one La(4), and one Ta(2) atom to form OLa3Ta tetrahedra that share corners with two equivalent O(1)La2ThTa tetrahedra, corners with two equivalent O(2)La2ThTa tetrahedra, corners with two equivalent O(5)La2ThTa tetrahedra, corners with two equivalent O(6)La2ThTa tetrahedra, corners with two equivalent O(4)LaTh2Ta tetrahedra,  an edgeedge with one O(1)La2ThTa tetrahedra,  an edgeedge with one O(2)La2ThTa tetrahedra,  an edgeedge with one O(6)La2ThTa tetrahedra, and edges with two equivalent O(3)La3Ta tetrahedra. In the fourth O site, O(4) is bonded to one Th(1), one Th(2), one La(2), and one Ta(1) atom to form distorted OLaTh2Ta tetrahedra that share corners with two equivalent O(1)La2ThTa tetrahedra, corners with two equivalent O(2)La2ThTa tetrahedra, corners with two equivalent O(5)La2ThTa tetrahedra, corners with two equivalent O(6)La2ThTa tetrahedra, corners with two equivalent O(3)La3Ta tetrahedra,  an edgeedge with one O(1)La2ThTa tetrahedra,  an edgeedge with one O(5)La2ThTa tetrahedra,  an edgeedge with one O(6)La2ThTa tetrahedra, and edges with two equivalent O(4)LaTh2Ta tetrahedra. In the fifth O site, O(5) is bonded to one Th(2), one La(1), one La(3), and one Ta(1) atom to form distorted OLa2ThTa tetrahedra that share corners with two equivalent O(1)La2ThTa tetrahedra, corners with two equivalent O(2)La2ThTa tetrahedra, corners with two equivalent O(6)La2ThTa tetrahedra, corners with two equivalent O(3)La3Ta tetrahedra, corners with two equivalent O(4)LaTh2Ta tetrahedra,  an edgeedge with one O(2)La2ThTa tetrahedra,  an edgeedge with one O(6)La2ThTa tetrahedra,  an edgeedge with one O(4)LaTh2Ta tetrahedra, and edges with two equivalent O(5)La2ThTa tetrahedra. In the sixth O site, O(6) is bonded to one Th(1), one La(1), one La(4), and one Ta(1) atom to form distorted OLa2ThTa tetrahedra that share corners with two equivalent O(1)La2ThTa tetrahedra, corners with two equivalent O(2)La2ThTa tetrahedra, corners with two equivalent O(5)La2ThTa tetrahedra, corners with two equivalent O(3)La3Ta tetrahedra, corners with two equivalent O(4)LaTh2Ta tetrahedra,  an edgeedge with one O(5)La2ThTa tetrahedra,  an edgeedge with one O(3)La3Ta tetrahedra,  an edgeedge with one O(4)LaTh2Ta tetrahedra, and edges with two equivalent O(6)La2ThTa tetrahedra. There are six inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a see-saw-like geometry to one Th(1), one La(1), and two equivalent La(3) atoms. In the second Cl site, Cl(2) is bonded in a see-saw-like geometry to one Th(1), one Th(2), and two equivalent La(4) atoms. In the third Cl site, Cl(3) is bonded in a see-saw-like geometry to one Th(2), one La(1), and two equivalent La(2) atoms. In the fourth Cl site, Cl(4) is bonded in a see-saw-like geometry to two equivalent Th(2), one La(2), and one La(4) atom. In the fifth Cl site, Cl(5) is bonded in a see-saw-like geometry to one La(2), one La(3), and two equivalent La(1) atoms. In the sixth Cl site, Cl(6) is bonded in a see-saw-like geometry to two equivalent Th(1), one La(3), and one La(4) atom. is represented by the CIF file [CIF]
data_La2ThTa(ClO2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.484
_cell_length_b   9.404
_cell_length_c   9.436
_cell_angle_alpha   60.552
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   423.729
_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
  La  La0  1  0.000  0.322  0.083  1.0
  La  La1  1  0.500  0.408  0.690  1.0
  La  La2  1  0.500  0.908  0.406  1.0
  La  La3  1  0.500  0.683  0.911  1.0
  Th  Th4  1  0.000  0.585  0.326  1.0
  Th  Th5  1  0.000  0.083  0.586  1.0
  Ta  Ta6  1  0.500  0.335  0.333  1.0
  Ta  Ta7  1  0.000  0.667  0.666  1.0
  Cl  Cl8  1  0.000  0.946  0.239  1.0
  Cl  Cl9  1  0.000  0.812  0.952  1.0
  Cl  Cl10  1  0.000  0.235  0.807  1.0
  Cl  Cl11  1  0.500  0.053  0.756  1.0
  Cl  Cl12  1  0.500  0.189  0.054  1.0
  Cl  Cl13  1  0.500  0.759  0.191  1.0
  O  O14  1  0.231  0.635  0.517  1.0
  O  O15  1  0.231  0.848  0.634  1.0
  O  O16  1  0.236  0.524  0.838  1.0
  O  O17  1  0.741  0.366  0.477  1.0
  O  O18  1  0.738  0.156  0.370  1.0
  O  O19  1  0.739  0.480  0.163  1.0
  O  O20  1  0.259  0.366  0.477  1.0
  O  O21  1  0.262  0.156  0.370  1.0
  O  O22  1  0.261  0.480  0.163  1.0
  O  O23  1  0.769  0.635  0.517  1.0
  O  O24  1  0.769  0.848  0.634  1.0
  O  O25  1  0.764  0.524  0.838  1.0
[/CIF]
.