The material structure described by LiPr2Ta2O7Cl2 crystallizes in the monoclinic Cm space group. Li(1) is bonded to one O(1), one O(2), two equivalent O(4), one Cl(1), and one Cl(2) atom to form distorted LiCl2O4 octahedra that share corners with two equivalent Li(1)Cl2O4 octahedra, edges with two equivalent Ta(1)O6 octahedra, and edges with two equivalent Ta(2)O6 octahedra. The corner-sharing octahedral tilt angles are 7°. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 9-coordinate geometry to one O(1), one O(7), two equivalent O(3), two equivalent O(5), one Cl(2), and two equivalent Cl(1) atoms. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to one O(2), one O(5), two equivalent O(6), two equivalent O(7), one Cl(1), and two equivalent Cl(2) atoms. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(3), one O(4), one O(5), one O(6), and two equivalent O(1) atoms to form TaO6 octahedra that share  a cornercorner with one Ta(2)O6 octahedra, corners with two equivalent Ta(1)O6 octahedra,  an edgeedge with one Ta(2)O6 octahedra, and edges with two equivalent Li(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles range from 2-5°. In the second Ta site, Ta(2) is bonded to one O(3), one O(4), one O(6), one O(7), and two equivalent O(2) atoms to form TaO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra, corners with two equivalent Ta(2)O6 octahedra,  an edgeedge with one Ta(1)O6 octahedra, and edges with two equivalent Li(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles range from 2-5°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Pr(1), and two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Li(1), one Pr(2), and two equivalent Ta(2) atoms. In the third O site, O(3) is bonded to two equivalent Pr(1), one Ta(1), and one Ta(2) atom to form distorted OPr2Ta2 trigonal pyramids that share corners with two equivalent O(5)Pr3Ta tetrahedra, corners with two equivalent Cl(1)LiPr3 tetrahedra, corners with two equivalent Cl(2)LiPr3 tetrahedra, corners with three equivalent O(7)Pr3Ta tetrahedra, corners with two equivalent O(3)Pr2Ta2 trigonal pyramids,  an edgeedge with one Cl(1)LiPr3 tetrahedra,  an edgeedge with one O(6)Pr2Ta2 trigonal pyramid, and  a faceface with one O(5)Pr3Ta tetrahedra. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to two equivalent Li(1), one Ta(1), and one Ta(2) atom. In the fifth O site, O(5) is bonded to one Pr(2), two equivalent Pr(1), and one Ta(1) atom to form distorted OPr3Ta tetrahedra that share corners with two equivalent O(5)Pr3Ta tetrahedra, corners with three equivalent Cl(1)LiPr3 tetrahedra, corners with four equivalent Cl(2)LiPr3 tetrahedra, corners with two equivalent O(3)Pr2Ta2 trigonal pyramids, corners with three equivalent O(6)Pr2Ta2 trigonal pyramids,  an edgeedge with one Cl(1)LiPr3 tetrahedra, edges with two equivalent O(7)Pr3Ta tetrahedra, and  a faceface with one O(3)Pr2Ta2 trigonal pyramid. In the sixth O site, O(6) is bonded to two equivalent Pr(2), one Ta(1), and one Ta(2) atom to form distorted OPr2Ta2 trigonal pyramids that share corners with two equivalent O(7)Pr3Ta tetrahedra, corners with two equivalent Cl(1)LiPr3 tetrahedra, corners with two equivalent Cl(2)LiPr3 tetrahedra, corners with three equivalent O(5)Pr3Ta tetrahedra, corners with two equivalent O(6)Pr2Ta2 trigonal pyramids,  an edgeedge with one Cl(2)LiPr3 tetrahedra,  an edgeedge with one O(3)Pr2Ta2 trigonal pyramid, and  a faceface with one O(7)Pr3Ta tetrahedra. In the seventh O site, O(7) is bonded to one Pr(1), two equivalent Pr(2), and one Ta(2) atom to form distorted OPr3Ta tetrahedra that share corners with two equivalent O(7)Pr3Ta tetrahedra, corners with three equivalent Cl(2)LiPr3 tetrahedra, corners with four equivalent Cl(1)LiPr3 tetrahedra, corners with two equivalent O(6)Pr2Ta2 trigonal pyramids, corners with three equivalent O(3)Pr2Ta2 trigonal pyramids,  an edgeedge with one Cl(2)LiPr3 tetrahedra, edges with two equivalent O(5)Pr3Ta tetrahedra, and  a faceface with one O(6)Pr2Ta2 trigonal pyramid. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to one Li(1), one Pr(2), and two equivalent Pr(1) atoms to form ClLiPr3 tetrahedra that share  a cornercorner with one Cl(2)LiPr3 tetrahedra, corners with two equivalent Cl(1)LiPr3 tetrahedra, corners with three equivalent O(5)Pr3Ta tetrahedra, corners with four equivalent O(7)Pr3Ta tetrahedra, corners with two equivalent O(3)Pr2Ta2 trigonal pyramids, corners with two equivalent O(6)Pr2Ta2 trigonal pyramids,  an edgeedge with one O(5)Pr3Ta tetrahedra, edges with two equivalent Cl(2)LiPr3 tetrahedra, and  an edgeedge with one O(3)Pr2Ta2 trigonal pyramid. In the second Cl site, Cl(2) is bonded to one Li(1), one Pr(1), and two equivalent Pr(2) atoms to form ClLiPr3 tetrahedra that share  a cornercorner with one Cl(1)LiPr3 tetrahedra, corners with two equivalent Cl(2)LiPr3 tetrahedra, corners with three equivalent O(7)Pr3Ta tetrahedra, corners with four equivalent O(5)Pr3Ta tetrahedra, corners with two equivalent O(3)Pr2Ta2 trigonal pyramids, corners with two equivalent O(6)Pr2Ta2 trigonal pyramids,  an edgeedge with one O(7)Pr3Ta tetrahedra, edges with two equivalent Cl(1)LiPr3 tetrahedra, and  an edgeedge with one O(6)Pr2Ta2 trigonal pyramid. is represented by the CIF file [CIF]
data_LiPr2Ta2Cl2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.058
_cell_length_b   7.037
_cell_length_c   8.070
_cell_angle_alpha   113.652
_cell_angle_beta   104.560
_cell_angle_gamma   89.996
_symmetry_Int_Tables_number   1
_cell_volume   202.985
_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
  Li  Li0  1  0.478  0.470  0.956  1.0
  Pr  Pr1  1  0.297  0.820  0.594  1.0
  Pr  Pr2  1  0.678  0.129  0.357  1.0
  Ta  Ta3  1  0.953  0.167  0.906  1.0
  Ta  Ta4  1  0.023  0.782  0.047  1.0
  Cl  Cl5  1  0.667  0.538  0.335  1.0
  Cl  Cl6  1  0.308  0.413  0.617  1.0
  O  O7  1  0.446  0.160  0.894  1.0
  O  O8  1  0.529  0.788  0.058  1.0
  O  O9  1  0.906  0.826  0.814  1.0
  O  O10  1  0.986  0.473  0.973  1.0
  O  O11  1  0.811  0.043  0.624  1.0
  O  O12  1  0.070  0.124  0.139  1.0
  O  O13  1  0.164  0.907  0.329  1.0
[/CIF]
.
The material structure described by LiPr2Ta2O7Cl2 crystallizes in the monoclinic Cm space group. Li(1) is bonded to one O(1), one O(2), two equivalent O(4), one Cl(1), and one Cl(2) atom to form distorted LiCl2O4 octahedra that share corners with two equivalent Li(1)Cl2O4 octahedra, edges with two equivalent Ta(1)O6 octahedra, and edges with two equivalent Ta(2)O6 octahedra. The corner-sharing octahedral tilt angles are 7°. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 9-coordinate geometry to one O(1), one O(7), two equivalent O(3), two equivalent O(5), one Cl(2), and two equivalent Cl(1) atoms. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to one O(2), one O(5), two equivalent O(6), two equivalent O(7), one Cl(1), and two equivalent Cl(2) atoms. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(3), one O(4), one O(5), one O(6), and two equivalent O(1) atoms to form TaO6 octahedra that share  a cornercorner with one Ta(2)O6 octahedra, corners with two equivalent Ta(1)O6 octahedra,  an edgeedge with one Ta(2)O6 octahedra, and edges with two equivalent Li(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles range from 2-5°. In the second Ta site, Ta(2) is bonded to one O(3), one O(4), one O(6), one O(7), and two equivalent O(2) atoms to form TaO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra, corners with two equivalent Ta(2)O6 octahedra,  an edgeedge with one Ta(1)O6 octahedra, and edges with two equivalent Li(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles range from 2-5°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Pr(1), and two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Li(1), one Pr(2), and two equivalent Ta(2) atoms. In the third O site, O(3) is bonded to two equivalent Pr(1), one Ta(1), and one Ta(2) atom to form distorted OPr2Ta2 trigonal pyramids that share corners with two equivalent O(5)Pr3Ta tetrahedra, corners with two equivalent Cl(1)LiPr3 tetrahedra, corners with two equivalent Cl(2)LiPr3 tetrahedra, corners with three equivalent O(7)Pr3Ta tetrahedra, corners with two equivalent O(3)Pr2Ta2 trigonal pyramids,  an edgeedge with one Cl(1)LiPr3 tetrahedra,  an edgeedge with one O(6)Pr2Ta2 trigonal pyramid, and  a faceface with one O(5)Pr3Ta tetrahedra. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to two equivalent Li(1), one Ta(1), and one Ta(2) atom. In the fifth O site, O(5) is bonded to one Pr(2), two equivalent Pr(1), and one Ta(1) atom to form distorted OPr3Ta tetrahedra that share corners with two equivalent O(5)Pr3Ta tetrahedra, corners with three equivalent Cl(1)LiPr3 tetrahedra, corners with four equivalent Cl(2)LiPr3 tetrahedra, corners with two equivalent O(3)Pr2Ta2 trigonal pyramids, corners with three equivalent O(6)Pr2Ta2 trigonal pyramids,  an edgeedge with one Cl(1)LiPr3 tetrahedra, edges with two equivalent O(7)Pr3Ta tetrahedra, and  a faceface with one O(3)Pr2Ta2 trigonal pyramid. In the sixth O site, O(6) is bonded to two equivalent Pr(2), one Ta(1), and one Ta(2) atom to form distorted OPr2Ta2 trigonal pyramids that share corners with two equivalent O(7)Pr3Ta tetrahedra, corners with two equivalent Cl(1)LiPr3 tetrahedra, corners with two equivalent Cl(2)LiPr3 tetrahedra, corners with three equivalent O(5)Pr3Ta tetrahedra, corners with two equivalent O(6)Pr2Ta2 trigonal pyramids,  an edgeedge with one Cl(2)LiPr3 tetrahedra,  an edgeedge with one O(3)Pr2Ta2 trigonal pyramid, and  a faceface with one O(7)Pr3Ta tetrahedra. In the seventh O site, O(7) is bonded to one Pr(1), two equivalent Pr(2), and one Ta(2) atom to form distorted OPr3Ta tetrahedra that share corners with two equivalent O(7)Pr3Ta tetrahedra, corners with three equivalent Cl(2)LiPr3 tetrahedra, corners with four equivalent Cl(1)LiPr3 tetrahedra, corners with two equivalent O(6)Pr2Ta2 trigonal pyramids, corners with three equivalent O(3)Pr2Ta2 trigonal pyramids,  an edgeedge with one Cl(2)LiPr3 tetrahedra, edges with two equivalent O(5)Pr3Ta tetrahedra, and  a faceface with one O(6)Pr2Ta2 trigonal pyramid. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to one Li(1), one Pr(2), and two equivalent Pr(1) atoms to form ClLiPr3 tetrahedra that share  a cornercorner with one Cl(2)LiPr3 tetrahedra, corners with two equivalent Cl(1)LiPr3 tetrahedra, corners with three equivalent O(5)Pr3Ta tetrahedra, corners with four equivalent O(7)Pr3Ta tetrahedra, corners with two equivalent O(3)Pr2Ta2 trigonal pyramids, corners with two equivalent O(6)Pr2Ta2 trigonal pyramids,  an edgeedge with one O(5)Pr3Ta tetrahedra, edges with two equivalent Cl(2)LiPr3 tetrahedra, and  an edgeedge with one O(3)Pr2Ta2 trigonal pyramid. In the second Cl site, Cl(2) is bonded to one Li(1), one Pr(1), and two equivalent Pr(2) atoms to form ClLiPr3 tetrahedra that share  a cornercorner with one Cl(1)LiPr3 tetrahedra, corners with two equivalent Cl(2)LiPr3 tetrahedra, corners with three equivalent O(7)Pr3Ta tetrahedra, corners with four equivalent O(5)Pr3Ta tetrahedra, corners with two equivalent O(3)Pr2Ta2 trigonal pyramids, corners with two equivalent O(6)Pr2Ta2 trigonal pyramids,  an edgeedge with one O(7)Pr3Ta tetrahedra, edges with two equivalent Cl(1)LiPr3 tetrahedra, and  an edgeedge with one O(6)Pr2Ta2 trigonal pyramid. is represented by the CIF file [CIF]
data_LiPr2Ta2Cl2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.058
_cell_length_b   7.037
_cell_length_c   8.070
_cell_angle_alpha   113.652
_cell_angle_beta   104.560
_cell_angle_gamma   89.996
_symmetry_Int_Tables_number   1
_cell_volume   202.985
_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
  Li  Li0  1  0.478  0.470  0.956  1.0
  Pr  Pr1  1  0.297  0.820  0.594  1.0
  Pr  Pr2  1  0.678  0.129  0.357  1.0
  Ta  Ta3  1  0.953  0.167  0.906  1.0
  Ta  Ta4  1  0.023  0.782  0.047  1.0
  Cl  Cl5  1  0.667  0.538  0.335  1.0
  Cl  Cl6  1  0.308  0.413  0.617  1.0
  O  O7  1  0.446  0.160  0.894  1.0
  O  O8  1  0.529  0.788  0.058  1.0
  O  O9  1  0.906  0.826  0.814  1.0
  O  O10  1  0.986  0.473  0.973  1.0
  O  O11  1  0.811  0.043  0.624  1.0
  O  O12  1  0.070  0.124  0.139  1.0
  O  O13  1  0.164  0.907  0.329  1.0
[/CIF]
.