The compound described by Th8La2O19 is alpha bismuth trifluoride-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are eight inequivalent Th sites. In the first Th site, Th(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(12), two equivalent O(13), and two equivalent O(14) atoms. In the second Th site, Th(2) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(14), two equivalent O(15), and two equivalent O(2) atoms. In the third Th site, Th(3) is bonded in a body-centered cubic geometry to two equivalent O(15), two equivalent O(16), two equivalent O(2), and two equivalent O(3) atoms. In the fourth Th site, Th(4) is bonded in a body-centered cubic geometry to two equivalent O(16), two equivalent O(17), two equivalent O(3), and two equivalent O(4) atoms. In the fifth Th site, Th(5) is bonded in a body-centered cubic geometry to two equivalent O(17), two equivalent O(18), two equivalent O(4), and two equivalent O(5) atoms. In the sixth Th site, Th(6) is bonded in a body-centered cubic geometry to two equivalent O(18), two equivalent O(19), two equivalent O(5), and two equivalent O(6) atoms. In the seventh Th site, Th(7) is bonded in a body-centered cubic geometry to two equivalent O(19), two equivalent O(6), two equivalent O(7), and two equivalent O(9) atoms. In the eighth Th site, Th(8) is bonded in a body-centered cubic geometry to two equivalent O(10), two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to two equivalent O(10), two equivalent O(11), and two equivalent O(8) atoms. In the second La site, La(2) is bonded in a 6-coordinate geometry to two equivalent O(11), two equivalent O(12), and two equivalent O(13) atoms. There are nineteen inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Th(1) and two equivalent Th(2) atoms to form OTh4 tetrahedra that share corners with two equivalent O(13)La2Th2 tetrahedra, corners with two equivalent O(15)Th4 tetrahedra, corners with four equivalent O(12)La2Th2 tetrahedra, corners with four equivalent O(1)Th4 tetrahedra, corners with four equivalent O(2)Th4 tetrahedra,  an edgeedge with one O(13)La2Th2 tetrahedra,  an edgeedge with one O(15)Th4 tetrahedra, and edges with four equivalent O(14)Th4 tetrahedra. In the second O site, O(2) is bonded to two equivalent Th(2) and two equivalent Th(3) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the third O site, O(3) is bonded to two equivalent Th(3) and two equivalent Th(4) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Th(4) and two equivalent Th(5) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the fifth O site, O(5) is bonded to two equivalent Th(5) and two equivalent Th(6) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Th(6) and two equivalent Th(7) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the seventh O site, O(7) is bonded to two equivalent Th(7) and two equivalent Th(8) atoms to form OTh4 tetrahedra that share corners with two equivalent O(10)La2Th2 tetrahedra, corners with two equivalent O(19)Th4 tetrahedra, corners with four equivalent O(8)La2Th2 tetrahedra, corners with four equivalent O(6)Th4 tetrahedra, corners with four equivalent O(7)Th4 tetrahedra,  an edgeedge with one O(10)La2Th2 tetrahedra,  an edgeedge with one O(19)Th4 tetrahedra, and edges with four equivalent O(9)Th4 tetrahedra. In the eighth O site, O(8) is bonded to two equivalent Th(8) and two equivalent La(1) atoms to form OLa2Th2 tetrahedra that share corners with two equivalent O(11)La4 tetrahedra, corners with two equivalent O(9)Th4 tetrahedra, corners with four equivalent O(8)La2Th2 tetrahedra, corners with four equivalent O(7)Th4 tetrahedra,  an edgeedge with one O(11)La4 tetrahedra,  an edgeedge with one O(9)Th4 tetrahedra, and edges with four equivalent O(10)La2Th2 tetrahedra. In the ninth O site, O(9) is bonded to two equivalent Th(7) and two equivalent Th(8) atoms to form OTh4 tetrahedra that share corners with two equivalent O(8)La2Th2 tetrahedra, corners with two equivalent O(6)Th4 tetrahedra, corners with four equivalent O(10)La2Th2 tetrahedra, corners with four equivalent O(19)Th4 tetrahedra, corners with four equivalent O(9)Th4 tetrahedra,  an edgeedge with one O(8)La2Th2 tetrahedra,  an edgeedge with one O(6)Th4 tetrahedra, and edges with four equivalent O(7)Th4 tetrahedra. In the tenth O site, O(10) is bonded to two equivalent Th(8) and two equivalent La(1) atoms to form OLa2Th2 tetrahedra that share corners with two equivalent O(7)Th4 tetrahedra, corners with four equivalent O(10)La2Th2 tetrahedra, corners with four equivalent O(11)La4 tetrahedra, corners with four equivalent O(9)Th4 tetrahedra,  an edgeedge with one O(7)Th4 tetrahedra, and edges with four equivalent O(8)La2Th2 tetrahedra. In the eleventh O site, O(11) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form OLa4 tetrahedra that share corners with two equivalent O(12)La2Th2 tetrahedra, corners with two equivalent O(8)La2Th2 tetrahedra, corners with four equivalent O(10)La2Th2 tetrahedra, corners with four equivalent O(13)La2Th2 tetrahedra, corners with four equivalent O(11)La4 tetrahedra,  an edgeedge with one O(12)La2Th2 tetrahedra, and  an edgeedge with one O(8)La2Th2 tetrahedra. In the twelfth O site, O(12) is bonded to two equivalent Th(1) and two equivalent La(2) atoms to form OLa2Th2 tetrahedra that share corners with two equivalent O(11)La4 tetrahedra, corners with two equivalent O(14)Th4 tetrahedra, corners with four equivalent O(12)La2Th2 tetrahedra, corners with four equivalent O(1)Th4 tetrahedra,  an edgeedge with one O(11)La4 tetrahedra,  an edgeedge with one O(14)Th4 tetrahedra, and edges with four equivalent O(13)La2Th2 tetrahedra. In the thirteenth O site, O(13) is bonded to two equivalent Th(1) and two equivalent La(2) atoms to form OLa2Th2 tetrahedra that share corners with two equivalent O(1)Th4 tetrahedra, corners with four equivalent O(13)La2Th2 tetrahedra, corners with four equivalent O(11)La4 tetrahedra, corners with four equivalent O(14)Th4 tetrahedra,  an edgeedge with one O(1)Th4 tetrahedra, and edges with four equivalent O(12)La2Th2 tetrahedra. In the fourteenth O site, O(14) is bonded to two equivalent Th(1) and two equivalent Th(2) atoms to form OTh4 tetrahedra that share corners with two equivalent O(12)La2Th2 tetrahedra, corners with two equivalent O(2)Th4 tetrahedra, corners with four equivalent O(13)La2Th2 tetrahedra, corners with four equivalent O(14)Th4 tetrahedra, corners with four equivalent O(15)Th4 tetrahedra,  an edgeedge with one O(12)La2Th2 tetrahedra,  an edgeedge with one O(2)Th4 tetrahedra, and edges with four equivalent O(1)Th4 tetrahedra. In the fifteenth O site, O(15) is bonded to two equivalent Th(2) and two equivalent Th(3) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the sixteenth O site, O(16) is bonded to two equivalent Th(3) and two equivalent Th(4) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the seventeenth O site, O(17) is bonded to two equivalent Th(4) and two equivalent Th(5) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the eighteenth O site, O(18) is bonded to two equivalent Th(5) and two equivalent Th(6) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the nineteenth O site, O(19) is bonded to two equivalent Th(6) and two equivalent Th(7) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. is represented by the CIF file [CIF]
data_La2Th8O19
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.810
_cell_length_b   4.081
_cell_length_c   27.825
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   432.621
_cell_formula_units_Z   1
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  0.000  0.005  1.0
  La  La1  1  0.500  0.500  0.894  1.0
  Th  Th2  1  0.000  0.000  0.799  1.0
  Th  Th3  1  0.500  0.500  0.700  1.0
  Th  Th4  1  0.000  0.000  0.600  1.0
  Th  Th5  1  0.500  0.500  0.499  1.0
  Th  Th6  1  0.000  0.000  0.399  1.0
  Th  Th7  1  0.500  0.500  0.299  1.0
  Th  Th8  1  0.000  0.000  0.200  1.0
  Th  Th9  1  0.500  0.500  0.099  1.0
  O  O10  1  0.000  0.500  0.750  1.0
  O  O11  1  0.500  0.000  0.649  1.0
  O  O12  1  0.000  0.500  0.549  1.0
  O  O13  1  0.500  0.000  0.449  1.0
  O  O14  1  0.000  0.500  0.349  1.0
  O  O15  1  0.500  0.000  0.249  1.0
  O  O16  1  0.000  0.500  0.148  1.0
  O  O17  1  0.500  0.000  0.052  1.0
  O  O18  1  0.500  0.000  0.152  1.0
  O  O19  1  0.000  0.500  0.050  1.0
  O  O20  1  0.500  0.000  0.953  1.0
  O  O21  1  0.500  0.000  0.846  1.0
  O  O22  1  0.000  0.500  0.853  1.0
  O  O23  1  0.500  0.000  0.750  1.0
  O  O24  1  0.000  0.500  0.652  1.0
  O  O25  1  0.500  0.000  0.551  1.0
  O  O26  1  0.000  0.500  0.451  1.0
  O  O27  1  0.500  0.000  0.351  1.0
  O  O28  1  0.000  0.500  0.251  1.0
[/CIF]
.
The compound described by Th8La2O19 is alpha bismuth trifluoride-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are eight inequivalent Th sites. In the first Th site, Th(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(12), two equivalent O(13), and two equivalent O(14) atoms. In the second Th site, Th(2) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(14), two equivalent O(15), and two equivalent O(2) atoms. In the third Th site, Th(3) is bonded in a body-centered cubic geometry to two equivalent O(15), two equivalent O(16), two equivalent O(2), and two equivalent O(3) atoms. In the fourth Th site, Th(4) is bonded in a body-centered cubic geometry to two equivalent O(16), two equivalent O(17), two equivalent O(3), and two equivalent O(4) atoms. In the fifth Th site, Th(5) is bonded in a body-centered cubic geometry to two equivalent O(17), two equivalent O(18), two equivalent O(4), and two equivalent O(5) atoms. In the sixth Th site, Th(6) is bonded in a body-centered cubic geometry to two equivalent O(18), two equivalent O(19), two equivalent O(5), and two equivalent O(6) atoms. In the seventh Th site, Th(7) is bonded in a body-centered cubic geometry to two equivalent O(19), two equivalent O(6), two equivalent O(7), and two equivalent O(9) atoms. In the eighth Th site, Th(8) is bonded in a body-centered cubic geometry to two equivalent O(10), two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to two equivalent O(10), two equivalent O(11), and two equivalent O(8) atoms. In the second La site, La(2) is bonded in a 6-coordinate geometry to two equivalent O(11), two equivalent O(12), and two equivalent O(13) atoms. There are nineteen inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Th(1) and two equivalent Th(2) atoms to form OTh4 tetrahedra that share corners with two equivalent O(13)La2Th2 tetrahedra, corners with two equivalent O(15)Th4 tetrahedra, corners with four equivalent O(12)La2Th2 tetrahedra, corners with four equivalent O(1)Th4 tetrahedra, corners with four equivalent O(2)Th4 tetrahedra,  an edgeedge with one O(13)La2Th2 tetrahedra,  an edgeedge with one O(15)Th4 tetrahedra, and edges with four equivalent O(14)Th4 tetrahedra. In the second O site, O(2) is bonded to two equivalent Th(2) and two equivalent Th(3) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the third O site, O(3) is bonded to two equivalent Th(3) and two equivalent Th(4) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Th(4) and two equivalent Th(5) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the fifth O site, O(5) is bonded to two equivalent Th(5) and two equivalent Th(6) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Th(6) and two equivalent Th(7) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the seventh O site, O(7) is bonded to two equivalent Th(7) and two equivalent Th(8) atoms to form OTh4 tetrahedra that share corners with two equivalent O(10)La2Th2 tetrahedra, corners with two equivalent O(19)Th4 tetrahedra, corners with four equivalent O(8)La2Th2 tetrahedra, corners with four equivalent O(6)Th4 tetrahedra, corners with four equivalent O(7)Th4 tetrahedra,  an edgeedge with one O(10)La2Th2 tetrahedra,  an edgeedge with one O(19)Th4 tetrahedra, and edges with four equivalent O(9)Th4 tetrahedra. In the eighth O site, O(8) is bonded to two equivalent Th(8) and two equivalent La(1) atoms to form OLa2Th2 tetrahedra that share corners with two equivalent O(11)La4 tetrahedra, corners with two equivalent O(9)Th4 tetrahedra, corners with four equivalent O(8)La2Th2 tetrahedra, corners with four equivalent O(7)Th4 tetrahedra,  an edgeedge with one O(11)La4 tetrahedra,  an edgeedge with one O(9)Th4 tetrahedra, and edges with four equivalent O(10)La2Th2 tetrahedra. In the ninth O site, O(9) is bonded to two equivalent Th(7) and two equivalent Th(8) atoms to form OTh4 tetrahedra that share corners with two equivalent O(8)La2Th2 tetrahedra, corners with two equivalent O(6)Th4 tetrahedra, corners with four equivalent O(10)La2Th2 tetrahedra, corners with four equivalent O(19)Th4 tetrahedra, corners with four equivalent O(9)Th4 tetrahedra,  an edgeedge with one O(8)La2Th2 tetrahedra,  an edgeedge with one O(6)Th4 tetrahedra, and edges with four equivalent O(7)Th4 tetrahedra. In the tenth O site, O(10) is bonded to two equivalent Th(8) and two equivalent La(1) atoms to form OLa2Th2 tetrahedra that share corners with two equivalent O(7)Th4 tetrahedra, corners with four equivalent O(10)La2Th2 tetrahedra, corners with four equivalent O(11)La4 tetrahedra, corners with four equivalent O(9)Th4 tetrahedra,  an edgeedge with one O(7)Th4 tetrahedra, and edges with four equivalent O(8)La2Th2 tetrahedra. In the eleventh O site, O(11) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form OLa4 tetrahedra that share corners with two equivalent O(12)La2Th2 tetrahedra, corners with two equivalent O(8)La2Th2 tetrahedra, corners with four equivalent O(10)La2Th2 tetrahedra, corners with four equivalent O(13)La2Th2 tetrahedra, corners with four equivalent O(11)La4 tetrahedra,  an edgeedge with one O(12)La2Th2 tetrahedra, and  an edgeedge with one O(8)La2Th2 tetrahedra. In the twelfth O site, O(12) is bonded to two equivalent Th(1) and two equivalent La(2) atoms to form OLa2Th2 tetrahedra that share corners with two equivalent O(11)La4 tetrahedra, corners with two equivalent O(14)Th4 tetrahedra, corners with four equivalent O(12)La2Th2 tetrahedra, corners with four equivalent O(1)Th4 tetrahedra,  an edgeedge with one O(11)La4 tetrahedra,  an edgeedge with one O(14)Th4 tetrahedra, and edges with four equivalent O(13)La2Th2 tetrahedra. In the thirteenth O site, O(13) is bonded to two equivalent Th(1) and two equivalent La(2) atoms to form OLa2Th2 tetrahedra that share corners with two equivalent O(1)Th4 tetrahedra, corners with four equivalent O(13)La2Th2 tetrahedra, corners with four equivalent O(11)La4 tetrahedra, corners with four equivalent O(14)Th4 tetrahedra,  an edgeedge with one O(1)Th4 tetrahedra, and edges with four equivalent O(12)La2Th2 tetrahedra. In the fourteenth O site, O(14) is bonded to two equivalent Th(1) and two equivalent Th(2) atoms to form OTh4 tetrahedra that share corners with two equivalent O(12)La2Th2 tetrahedra, corners with two equivalent O(2)Th4 tetrahedra, corners with four equivalent O(13)La2Th2 tetrahedra, corners with four equivalent O(14)Th4 tetrahedra, corners with four equivalent O(15)Th4 tetrahedra,  an edgeedge with one O(12)La2Th2 tetrahedra,  an edgeedge with one O(2)Th4 tetrahedra, and edges with four equivalent O(1)Th4 tetrahedra. In the fifteenth O site, O(15) is bonded to two equivalent Th(2) and two equivalent Th(3) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the sixteenth O site, O(16) is bonded to two equivalent Th(3) and two equivalent Th(4) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the seventeenth O site, O(17) is bonded to two equivalent Th(4) and two equivalent Th(5) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the eighteenth O site, O(18) is bonded to two equivalent Th(5) and two equivalent Th(6) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. In the nineteenth O site, O(19) is bonded to two equivalent Th(6) and two equivalent Th(7) atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra. is represented by the CIF file [CIF]
data_La2Th8O19
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.810
_cell_length_b   4.081
_cell_length_c   27.825
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   432.621
_cell_formula_units_Z   1
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  0.000  0.005  1.0
  La  La1  1  0.500  0.500  0.894  1.0
  Th  Th2  1  0.000  0.000  0.799  1.0
  Th  Th3  1  0.500  0.500  0.700  1.0
  Th  Th4  1  0.000  0.000  0.600  1.0
  Th  Th5  1  0.500  0.500  0.499  1.0
  Th  Th6  1  0.000  0.000  0.399  1.0
  Th  Th7  1  0.500  0.500  0.299  1.0
  Th  Th8  1  0.000  0.000  0.200  1.0
  Th  Th9  1  0.500  0.500  0.099  1.0
  O  O10  1  0.000  0.500  0.750  1.0
  O  O11  1  0.500  0.000  0.649  1.0
  O  O12  1  0.000  0.500  0.549  1.0
  O  O13  1  0.500  0.000  0.449  1.0
  O  O14  1  0.000  0.500  0.349  1.0
  O  O15  1  0.500  0.000  0.249  1.0
  O  O16  1  0.000  0.500  0.148  1.0
  O  O17  1  0.500  0.000  0.052  1.0
  O  O18  1  0.500  0.000  0.152  1.0
  O  O19  1  0.000  0.500  0.050  1.0
  O  O20  1  0.500  0.000  0.953  1.0
  O  O21  1  0.500  0.000  0.846  1.0
  O  O22  1  0.000  0.500  0.853  1.0
  O  O23  1  0.500  0.000  0.750  1.0
  O  O24  1  0.000  0.500  0.652  1.0
  O  O25  1  0.500  0.000  0.551  1.0
  O  O26  1  0.000  0.500  0.451  1.0
  O  O27  1  0.500  0.000  0.351  1.0
  O  O28  1  0.000  0.500  0.251  1.0
[/CIF]
.