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(3), and one Cl(2) atom to form LiClO4 trigonal bipyramids that share corners with two equivalent Li(1)ClO4 trigonal bipyramids, edges with two equivalent Ta(1)O6 octahedra, and edges with two equivalent Ta(2)O6 octahedra. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 7-coordinate geometry to one O(1), one O(7), two equivalent O(5), one Cl(2), and two equivalent Cl(1) atoms. In the second Pr site, Pr(2) is bonded in a 8-coordinate geometry to one O(2), 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 distorted 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)ClO4 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 1-18°. 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 distorted 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)ClO4 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 1-6°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped 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 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 in a see-saw-like geometry to two equivalent Li(1), one Ta(1), and one Ta(2) atom. In the fourth O site, O(4) is bonded in a linear geometry to one Ta(1) and one Ta(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to two equivalent Pr(1) and one Ta(1) atom. 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(6)Pr2Ta2 trigonal pyramids, corners with two equivalent O(7)Pr3Ta trigonal pyramids, and  a faceface with one O(7)Pr3Ta trigonal pyramid. 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 trigonal pyramids that share corners with two equivalent O(6)Pr2Ta2 trigonal pyramids, corners with two equivalent O(7)Pr3Ta trigonal pyramids, 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 in a trigonal non-coplanar geometry to one Pr(2) and two equivalent Pr(1) atoms. In the second Cl site, Cl(2) is bonded in a 4-coordinate geometry to one Li(1), one Pr(1), and two equivalent Pr(2) atoms. is represented by the CIF card [CIF]
data_LiPr2Ta2Cl2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.043
_cell_length_b   6.813
_cell_length_c   9.488
_cell_angle_alpha   117.636
_cell_angle_beta   102.300
_cell_angle_gamma   90.006
_symmetry_Int_Tables_number   1
_cell_volume   224.703
_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  0.435  0.777  0.870  1.0
  Pr  Pr1  1  0.285  0.902  0.570  1.0
  Pr  Pr2  1  0.662  0.189  0.325  1.0
  Ta  Ta3  1  0.969  0.154  0.938  1.0
  Ta  Ta4  1  0.046  0.790  0.092  1.0
  Cl  Cl5  1  0.672  0.608  0.344  1.0
  Cl  Cl6  1  0.297  0.475  0.594  1.0
  O  O7  1  0.452  0.106  0.905  1.0
  O  O8  1  0.547  0.807  0.096  1.0
  O  O9  1  0.945  0.807  0.890  1.0
  O  O10  1  0.008  0.469  0.017  1.0
  O  O11  1  0.847  0.047  0.694  1.0
  O  O12  1  0.079  0.165  0.159  1.0
  O  O13  1  0.172  0.973  0.345  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(3), and one Cl(2) atom to form LiClO4 trigonal bipyramids that share corners with two equivalent Li(1)ClO4 trigonal bipyramids, edges with two equivalent Ta(1)O6 octahedra, and edges with two equivalent Ta(2)O6 octahedra. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 7-coordinate geometry to one O(1), one O(7), two equivalent O(5), one Cl(2), and two equivalent Cl(1) atoms. In the second Pr site, Pr(2) is bonded in a 8-coordinate geometry to one O(2), 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 distorted 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)ClO4 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 1-18°. 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 distorted 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)ClO4 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 1-6°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped 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 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 in a see-saw-like geometry to two equivalent Li(1), one Ta(1), and one Ta(2) atom. In the fourth O site, O(4) is bonded in a linear geometry to one Ta(1) and one Ta(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to two equivalent Pr(1) and one Ta(1) atom. 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(6)Pr2Ta2 trigonal pyramids, corners with two equivalent O(7)Pr3Ta trigonal pyramids, and  a faceface with one O(7)Pr3Ta trigonal pyramid. 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 trigonal pyramids that share corners with two equivalent O(6)Pr2Ta2 trigonal pyramids, corners with two equivalent O(7)Pr3Ta trigonal pyramids, 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 in a trigonal non-coplanar geometry to one Pr(2) and two equivalent Pr(1) atoms. In the second Cl site, Cl(2) is bonded in a 4-coordinate geometry to one Li(1), one Pr(1), and two equivalent Pr(2) atoms. is represented by the CIF card [CIF]
data_LiPr2Ta2Cl2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.043
_cell_length_b   6.813
_cell_length_c   9.488
_cell_angle_alpha   117.636
_cell_angle_beta   102.300
_cell_angle_gamma   90.006
_symmetry_Int_Tables_number   1
_cell_volume   224.703
_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  0.435  0.777  0.870  1.0
  Pr  Pr1  1  0.285  0.902  0.570  1.0
  Pr  Pr2  1  0.662  0.189  0.325  1.0
  Ta  Ta3  1  0.969  0.154  0.938  1.0
  Ta  Ta4  1  0.046  0.790  0.092  1.0
  Cl  Cl5  1  0.672  0.608  0.344  1.0
  Cl  Cl6  1  0.297  0.475  0.594  1.0
  O  O7  1  0.452  0.106  0.905  1.0
  O  O8  1  0.547  0.807  0.096  1.0
  O  O9  1  0.945  0.807  0.890  1.0
  O  O10  1  0.008  0.469  0.017  1.0
  O  O11  1  0.847  0.047  0.694  1.0
  O  O12  1  0.079  0.165  0.159  1.0
  O  O13  1  0.172  0.973  0.345  1.0
[/CIF]
.