The material described by K2U3(TeO7)2 crystallizes in the triclinic P-1 space group. K(1) is bonded to one O(3), one O(7), two equivalent O(1), and two equivalent O(2) atoms to form distorted KO6 octahedra that share corners with two equivalent U(2)O6 octahedra, corners with four equivalent U(1)O7 pentagonal bipyramids, and edges with two equivalent K(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-59°. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(2), one O(3), one O(5), one O(6), one O(7), and two equivalent O(4) atoms to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one U(2)O6 octahedra, corners with four equivalent K(1)O6 octahedra,  an edgeedge with one U(2)O6 octahedra, and  an edgeedge with one U(1)O7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 47-64°. In the second U site, U(2) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form distorted UO6 octahedra that share corners with four equivalent K(1)O6 octahedra, corners with two equivalent U(1)O7 pentagonal bipyramids, and edges with two equivalent U(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 53-59°. Te(1) is bonded in a 3-coordinate geometry to one O(5), one O(6), and two equivalent O(7) atoms. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1) and one U(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one U(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(1) and one U(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one U(2) and two equivalent U(1) atoms. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one U(1), one U(2), and one Te(1) atom. In the sixth O site, O(6) is bonded in a linear geometry to one U(1) and one Te(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one K(1), one U(1), and two equivalent Te(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2U3(TeO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.012
_cell_length_b   7.120
_cell_length_c   8.148
_cell_angle_alpha   106.407
_cell_angle_beta   102.131
_cell_angle_gamma   97.589
_symmetry_Int_Tables_number   1
_cell_volume   373.482
_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
  K  K0  1  0.297  0.603  0.156  1.0
  K  K1  1  0.703  0.397  0.844  1.0
  U  U2  1  0.602  0.165  0.240  1.0
  U  U3  1  0.398  0.835  0.760  1.0
  U  U4  1  0.000  0.000  0.000  1.0
  Te  Te5  1  0.163  0.324  0.491  1.0
  Te  Te6  1  0.837  0.676  0.509  1.0
  O  O7  1  0.969  0.764  0.055  1.0
  O  O8  1  0.031  0.236  0.945  1.0
  O  O9  1  0.613  0.395  0.171  1.0
  O  O10  1  0.387  0.605  0.829  1.0
  O  O11  1  0.606  0.948  0.321  1.0
  O  O12  1  0.394  0.052  0.679  1.0
  O  O13  1  0.680  0.004  0.976  1.0
  O  O14  1  0.037  0.820  0.725  1.0
  O  O15  1  0.963  0.180  0.275  1.0
  O  O16  1  0.633  0.736  0.626  1.0
  O  O17  1  0.367  0.264  0.374  1.0
  O  O18  1  0.816  0.410  0.524  1.0
  O  O19  1  0.184  0.590  0.476  1.0
  O  O20  1  0.320  0.996  0.024  1.0
[/CIF]
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The material described by K2U3(TeO7)2 crystallizes in the triclinic P-1 space group. K(1) is bonded to one O(3), one O(7), two equivalent O(1), and two equivalent O(2) atoms to form distorted KO6 octahedra that share corners with two equivalent U(2)O6 octahedra, corners with four equivalent U(1)O7 pentagonal bipyramids, and edges with two equivalent K(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-59°. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(2), one O(3), one O(5), one O(6), one O(7), and two equivalent O(4) atoms to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one U(2)O6 octahedra, corners with four equivalent K(1)O6 octahedra,  an edgeedge with one U(2)O6 octahedra, and  an edgeedge with one U(1)O7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 47-64°. In the second U site, U(2) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form distorted UO6 octahedra that share corners with four equivalent K(1)O6 octahedra, corners with two equivalent U(1)O7 pentagonal bipyramids, and edges with two equivalent U(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 53-59°. Te(1) is bonded in a 3-coordinate geometry to one O(5), one O(6), and two equivalent O(7) atoms. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1) and one U(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one U(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(1) and one U(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one U(2) and two equivalent U(1) atoms. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one U(1), one U(2), and one Te(1) atom. In the sixth O site, O(6) is bonded in a linear geometry to one U(1) and one Te(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one K(1), one U(1), and two equivalent Te(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2U3(TeO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.012
_cell_length_b   7.120
_cell_length_c   8.148
_cell_angle_alpha   106.407
_cell_angle_beta   102.131
_cell_angle_gamma   97.589
_symmetry_Int_Tables_number   1
_cell_volume   373.482
_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
  K  K0  1  0.297  0.603  0.156  1.0
  K  K1  1  0.703  0.397  0.844  1.0
  U  U2  1  0.602  0.165  0.240  1.0
  U  U3  1  0.398  0.835  0.760  1.0
  U  U4  1  0.000  0.000  0.000  1.0
  Te  Te5  1  0.163  0.324  0.491  1.0
  Te  Te6  1  0.837  0.676  0.509  1.0
  O  O7  1  0.969  0.764  0.055  1.0
  O  O8  1  0.031  0.236  0.945  1.0
  O  O9  1  0.613  0.395  0.171  1.0
  O  O10  1  0.387  0.605  0.829  1.0
  O  O11  1  0.606  0.948  0.321  1.0
  O  O12  1  0.394  0.052  0.679  1.0
  O  O13  1  0.680  0.004  0.976  1.0
  O  O14  1  0.037  0.820  0.725  1.0
  O  O15  1  0.963  0.180  0.275  1.0
  O  O16  1  0.633  0.736  0.626  1.0
  O  O17  1  0.367  0.264  0.374  1.0
  O  O18  1  0.816  0.410  0.524  1.0
  O  O19  1  0.184  0.590  0.476  1.0
  O  O20  1  0.320  0.996  0.024  1.0
[/CIF]
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