The crystal structure described by K2USO7F2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(3), one O(5), one O(7), two equivalent O(4), two equivalent O(6), and one F(2) atom. In the second K site, K(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(4), two equivalent O(7), one F(1), and two equivalent F(2) atoms. U(1) is bonded to one O(1), one O(2), one O(3), one O(5), one F(2), and two equivalent F(1) atoms to form distorted UO4F3 pentagonal bipyramids that share corners with two equivalent S(1)O4 tetrahedra and  an edgeedge with one U(1)O4F3 pentagonal bipyramid. S(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SO4 tetrahedra that share corners with two equivalent U(1)O4F3 pentagonal bipyramids. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one K(1), one U(1), and one S(1) atom. In the second O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(1) and one S(1) atom. In the third O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one K(1) and two equivalent K(2) atoms. In the fourth O site, O(1) is bonded in a distorted single-bond geometry to one K(2) and one U(1) atom. In the fifth O site, O(2) is bonded in a distorted single-bond geometry to one K(2) and one U(1) atom. In the sixth O site, O(3) is bonded in a 1-coordinate geometry to one K(1), one U(1), and one S(1) atom. In the seventh O site, O(4) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one S(1) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted bent 120 degrees geometry to one K(2) and two equivalent U(1) atoms. In the second F site, F(2) is bonded to one K(1), two equivalent K(2), and one U(1) atom to form edge-sharing FK3U tetrahedra. is represented by the CIF card [CIF]
data_K2USO7F2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.748
_cell_length_b   9.359
_cell_length_c   11.152
_cell_angle_alpha   78.675
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   895.284
_cell_formula_units_Z   4
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  0.976  0.584  0.697  1.0
  K  K1  1  0.476  0.416  0.803  1.0
  K  K2  1  0.024  0.416  0.303  1.0
  K  K3  1  0.524  0.584  0.197  1.0
  K  K4  1  0.953  0.079  0.648  1.0
  K  K5  1  0.453  0.921  0.852  1.0
  K  K6  1  0.047  0.921  0.352  1.0
  K  K7  1  0.547  0.079  0.148  1.0
  U  U8  1  0.605  0.810  0.511  1.0
  U  U9  1  0.105  0.190  0.989  1.0
  U  U10  1  0.395  0.190  0.489  1.0
  U  U11  1  0.895  0.810  0.011  1.0
  S  S12  1  0.274  0.572  0.494  1.0
  S  S13  1  0.774  0.428  0.006  1.0
  S  S14  1  0.726  0.428  0.506  1.0
  S  S15  1  0.226  0.572  0.994  1.0
  O  O16  1  0.548  0.767  0.671  1.0
  O  O17  1  0.048  0.233  0.829  1.0
  O  O18  1  0.452  0.233  0.329  1.0
  O  O19  1  0.952  0.767  0.171  1.0
  O  O20  1  0.658  0.854  0.350  1.0
  O  O21  1  0.158  0.146  0.150  1.0
  O  O22  1  0.342  0.146  0.650  1.0
  O  O23  1  0.842  0.854  0.850  1.0
  O  O24  1  0.414  0.659  0.441  1.0
  O  O25  1  0.914  0.341  0.059  1.0
  O  O26  1  0.586  0.341  0.559  1.0
  O  O27  1  0.086  0.659  0.941  1.0
  O  O28  1  0.134  0.645  0.443  1.0
  O  O29  1  0.634  0.355  0.057  1.0
  O  O30  1  0.866  0.355  0.557  1.0
  O  O31  1  0.366  0.645  0.943  1.0
  O  O32  1  0.286  0.428  0.452  1.0
  O  O33  1  0.786  0.572  0.048  1.0
  O  O34  1  0.714  0.572  0.548  1.0
  O  O35  1  0.214  0.428  0.952  1.0
  O  O36  1  0.277  0.547  0.628  1.0
  O  O37  1  0.777  0.453  0.872  1.0
  O  O38  1  0.723  0.453  0.372  1.0
  O  O39  1  0.223  0.547  0.128  1.0
  O  O40  1  0.688  0.161  0.788  1.0
  O  O41  1  0.188  0.839  0.712  1.0
  O  O42  1  0.312  0.839  0.212  1.0
  O  O43  1  0.812  0.161  0.288  1.0
  F  F44  1  0.625  0.053  0.530  1.0
  F  F45  1  0.125  0.947  0.970  1.0
  F  F46  1  0.375  0.947  0.470  1.0
  F  F47  1  0.875  0.053  0.030  1.0
  F  F48  1  0.849  0.845  0.555  1.0
  F  F49  1  0.349  0.155  0.945  1.0
  F  F50  1  0.151  0.155  0.445  1.0
  F  F51  1  0.651  0.845  0.055  1.0
[/CIF]
.
The crystal structure described by K2USO7F2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(3), one O(5), one O(7), two equivalent O(4), two equivalent O(6), and one F(2) atom. In the second K site, K(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(4), two equivalent O(7), one F(1), and two equivalent F(2) atoms. U(1) is bonded to one O(1), one O(2), one O(3), one O(5), one F(2), and two equivalent F(1) atoms to form distorted UO4F3 pentagonal bipyramids that share corners with two equivalent S(1)O4 tetrahedra and  an edgeedge with one U(1)O4F3 pentagonal bipyramid. S(1) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SO4 tetrahedra that share corners with two equivalent U(1)O4F3 pentagonal bipyramids. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one K(1), one U(1), and one S(1) atom. In the second O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(1) and one S(1) atom. In the third O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one K(1) and two equivalent K(2) atoms. In the fourth O site, O(1) is bonded in a distorted single-bond geometry to one K(2) and one U(1) atom. In the fifth O site, O(2) is bonded in a distorted single-bond geometry to one K(2) and one U(1) atom. In the sixth O site, O(3) is bonded in a 1-coordinate geometry to one K(1), one U(1), and one S(1) atom. In the seventh O site, O(4) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one S(1) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted bent 120 degrees geometry to one K(2) and two equivalent U(1) atoms. In the second F site, F(2) is bonded to one K(1), two equivalent K(2), and one U(1) atom to form edge-sharing FK3U tetrahedra. is represented by the CIF card [CIF]
data_K2USO7F2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.748
_cell_length_b   9.359
_cell_length_c   11.152
_cell_angle_alpha   78.675
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   895.284
_cell_formula_units_Z   4
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  0.976  0.584  0.697  1.0
  K  K1  1  0.476  0.416  0.803  1.0
  K  K2  1  0.024  0.416  0.303  1.0
  K  K3  1  0.524  0.584  0.197  1.0
  K  K4  1  0.953  0.079  0.648  1.0
  K  K5  1  0.453  0.921  0.852  1.0
  K  K6  1  0.047  0.921  0.352  1.0
  K  K7  1  0.547  0.079  0.148  1.0
  U  U8  1  0.605  0.810  0.511  1.0
  U  U9  1  0.105  0.190  0.989  1.0
  U  U10  1  0.395  0.190  0.489  1.0
  U  U11  1  0.895  0.810  0.011  1.0
  S  S12  1  0.274  0.572  0.494  1.0
  S  S13  1  0.774  0.428  0.006  1.0
  S  S14  1  0.726  0.428  0.506  1.0
  S  S15  1  0.226  0.572  0.994  1.0
  O  O16  1  0.548  0.767  0.671  1.0
  O  O17  1  0.048  0.233  0.829  1.0
  O  O18  1  0.452  0.233  0.329  1.0
  O  O19  1  0.952  0.767  0.171  1.0
  O  O20  1  0.658  0.854  0.350  1.0
  O  O21  1  0.158  0.146  0.150  1.0
  O  O22  1  0.342  0.146  0.650  1.0
  O  O23  1  0.842  0.854  0.850  1.0
  O  O24  1  0.414  0.659  0.441  1.0
  O  O25  1  0.914  0.341  0.059  1.0
  O  O26  1  0.586  0.341  0.559  1.0
  O  O27  1  0.086  0.659  0.941  1.0
  O  O28  1  0.134  0.645  0.443  1.0
  O  O29  1  0.634  0.355  0.057  1.0
  O  O30  1  0.866  0.355  0.557  1.0
  O  O31  1  0.366  0.645  0.943  1.0
  O  O32  1  0.286  0.428  0.452  1.0
  O  O33  1  0.786  0.572  0.048  1.0
  O  O34  1  0.714  0.572  0.548  1.0
  O  O35  1  0.214  0.428  0.952  1.0
  O  O36  1  0.277  0.547  0.628  1.0
  O  O37  1  0.777  0.453  0.872  1.0
  O  O38  1  0.723  0.453  0.372  1.0
  O  O39  1  0.223  0.547  0.128  1.0
  O  O40  1  0.688  0.161  0.788  1.0
  O  O41  1  0.188  0.839  0.712  1.0
  O  O42  1  0.312  0.839  0.212  1.0
  O  O43  1  0.812  0.161  0.288  1.0
  F  F44  1  0.625  0.053  0.530  1.0
  F  F45  1  0.125  0.947  0.970  1.0
  F  F46  1  0.375  0.947  0.470  1.0
  F  F47  1  0.875  0.053  0.030  1.0
  F  F48  1  0.849  0.845  0.555  1.0
  F  F49  1  0.349  0.155  0.945  1.0
  F  F50  1  0.151  0.155  0.445  1.0
  F  F51  1  0.651  0.845  0.055  1.0
[/CIF]
.