The crystal structure described by K4UO5 crystallizes in the triclinic P-1 space group. There are five inequivalent K sites. In the first K site, K(1) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(4) atoms to form distorted KO6 octahedra that share  a cornercorner with one K(5)O6 octahedra, corners with two equivalent U(1)O6 octahedra, edges with two equivalent K(1)O6 octahedra, edges with two equivalent K(5)O6 octahedra, edges with three equivalent K(2)O6 octahedra, and edges with three equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-25°. In the second K site, K(2) is bonded to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms to form distorted KO6 octahedra that share  a cornercorner with one K(5)O6 octahedra, corners with three equivalent U(1)O6 octahedra,  an edgeedge with one K(2)O6 octahedra,  an edgeedge with one K(5)O6 octahedra, edges with two equivalent U(1)O6 octahedra, and edges with three equivalent K(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-25°. In the third K site, K(3) is bonded in a 6-coordinate geometry to one O(1), one O(3), two equivalent O(2), and two equivalent O(5) atoms. In the fourth K site, K(4) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. In the fifth K site, K(5) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted KO6 octahedra that share corners with two equivalent K(1)O6 octahedra, corners with two equivalent K(2)O6 octahedra, edges with two equivalent K(2)O6 octahedra, edges with four equivalent K(1)O6 octahedra, and edges with four equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles are 25°. U(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form UO6 octahedra that share corners with two equivalent K(1)O6 octahedra, corners with three equivalent K(2)O6 octahedra,  an edgeedge with one U(1)O6 octahedra, edges with two equivalent K(2)O6 octahedra, edges with two equivalent K(5)O6 octahedra, and edges with three equivalent K(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-17°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one K(2), one K(3), one K(5), two equivalent K(1), and one U(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one K(4), two equivalent K(2), two equivalent K(3), and one U(1) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one K(5), and one U(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one K(2), one K(5), two equivalent K(1), and two equivalent U(1) atoms. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one K(1), one K(2), one K(4), two equivalent K(3), and one U(1) atom. is represented by the CIF card [CIF]
data_K4UO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.474
_cell_length_b   6.450
_cell_length_c   9.711
_cell_angle_alpha   101.462
_cell_angle_beta   108.886
_cell_angle_gamma   102.294
_symmetry_Int_Tables_number   1
_cell_volume   358.867
_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
  K  K0  1  0.695  0.481  0.903  1.0
  K  K1  1  0.889  0.504  0.302  1.0
  K  K2  1  0.699  0.001  0.403  1.0
  K  K3  1  0.301  0.999  0.597  1.0
  K  K4  1  0.305  0.519  0.097  1.0
  K  K5  1  0.500  0.500  0.500  1.0
  K  K6  1  0.500  0.000  0.000  1.0
  K  K7  1  0.111  0.496  0.698  1.0
  U  U8  1  0.905  0.994  0.804  1.0
  U  U9  1  0.095  0.006  0.196  1.0
  O  O10  1  0.215  0.198  0.841  1.0
  O  O11  1  0.785  0.802  0.159  1.0
  O  O12  1  0.907  0.789  0.610  1.0
  O  O13  1  0.093  0.211  0.390  1.0
  O  O14  1  0.408  0.207  0.236  1.0
  O  O15  1  0.592  0.793  0.764  1.0
  O  O16  1  0.069  0.819  0.965  1.0
  O  O17  1  0.931  0.181  0.035  1.0
  O  O18  1  0.246  0.803  0.307  1.0
  O  O19  1  0.754  0.197  0.693  1.0
[/CIF]
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The crystal structure described by K4UO5 crystallizes in the triclinic P-1 space group. There are five inequivalent K sites. In the first K site, K(1) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(4) atoms to form distorted KO6 octahedra that share  a cornercorner with one K(5)O6 octahedra, corners with two equivalent U(1)O6 octahedra, edges with two equivalent K(1)O6 octahedra, edges with two equivalent K(5)O6 octahedra, edges with three equivalent K(2)O6 octahedra, and edges with three equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-25°. In the second K site, K(2) is bonded to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms to form distorted KO6 octahedra that share  a cornercorner with one K(5)O6 octahedra, corners with three equivalent U(1)O6 octahedra,  an edgeedge with one K(2)O6 octahedra,  an edgeedge with one K(5)O6 octahedra, edges with two equivalent U(1)O6 octahedra, and edges with three equivalent K(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-25°. In the third K site, K(3) is bonded in a 6-coordinate geometry to one O(1), one O(3), two equivalent O(2), and two equivalent O(5) atoms. In the fourth K site, K(4) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. In the fifth K site, K(5) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted KO6 octahedra that share corners with two equivalent K(1)O6 octahedra, corners with two equivalent K(2)O6 octahedra, edges with two equivalent K(2)O6 octahedra, edges with four equivalent K(1)O6 octahedra, and edges with four equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles are 25°. U(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form UO6 octahedra that share corners with two equivalent K(1)O6 octahedra, corners with three equivalent K(2)O6 octahedra,  an edgeedge with one U(1)O6 octahedra, edges with two equivalent K(2)O6 octahedra, edges with two equivalent K(5)O6 octahedra, and edges with three equivalent K(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-17°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one K(2), one K(3), one K(5), two equivalent K(1), and one U(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one K(4), two equivalent K(2), two equivalent K(3), and one U(1) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one K(1), one K(2), one K(3), one K(4), one K(5), and one U(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one K(2), one K(5), two equivalent K(1), and two equivalent U(1) atoms. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one K(1), one K(2), one K(4), two equivalent K(3), and one U(1) atom. is represented by the CIF card [CIF]
data_K4UO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.474
_cell_length_b   6.450
_cell_length_c   9.711
_cell_angle_alpha   101.462
_cell_angle_beta   108.886
_cell_angle_gamma   102.294
_symmetry_Int_Tables_number   1
_cell_volume   358.867
_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
  K  K0  1  0.695  0.481  0.903  1.0
  K  K1  1  0.889  0.504  0.302  1.0
  K  K2  1  0.699  0.001  0.403  1.0
  K  K3  1  0.301  0.999  0.597  1.0
  K  K4  1  0.305  0.519  0.097  1.0
  K  K5  1  0.500  0.500  0.500  1.0
  K  K6  1  0.500  0.000  0.000  1.0
  K  K7  1  0.111  0.496  0.698  1.0
  U  U8  1  0.905  0.994  0.804  1.0
  U  U9  1  0.095  0.006  0.196  1.0
  O  O10  1  0.215  0.198  0.841  1.0
  O  O11  1  0.785  0.802  0.159  1.0
  O  O12  1  0.907  0.789  0.610  1.0
  O  O13  1  0.093  0.211  0.390  1.0
  O  O14  1  0.408  0.207  0.236  1.0
  O  O15  1  0.592  0.793  0.764  1.0
  O  O16  1  0.069  0.819  0.965  1.0
  O  O17  1  0.931  0.181  0.035  1.0
  O  O18  1  0.246  0.803  0.307  1.0
  O  O19  1  0.754  0.197  0.693  1.0
[/CIF]
.