The material structure described by U3W2O17F2 crystallizes in the monoclinic C2/m space group. 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(7), two equivalent O(1), and one F(2) atom to form distorted UO6F pentagonal bipyramids that share corners with three equivalent W(1)O6 octahedra,  a cornercorner with one U(1)O6F pentagonal bipyramid,  an edgeedge with one W(1)O6 octahedra, and  an edgeedge with one U(1)O6F pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 31-40°. In the second U site, U(2) is bonded to one O(10), one O(8), one O(9), two equivalent O(6), and two equivalent F(1) atoms to form distorted UO5F2 pentagonal bipyramids that share corners with two equivalent W(1)O6 octahedra and  an edgeedge with one U(2)O5F2 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 20°. W(1) is bonded to one O(1), one O(2), one O(4), one O(6), and two equivalent O(3) atoms to form distorted WO6 octahedra that share  a cornercorner with one U(2)O5F2 pentagonal bipyramid, corners with three equivalent U(1)O6F pentagonal bipyramids,  an edgeedge with one W(1)O6 octahedra, and  an edgeedge with one U(1)O6F pentagonal bipyramid. There are ten inequivalent O sites. In the first O site, O(4) is bonded in a single-bond geometry to one W(1) atom. In the second O site, O(5) is bonded in a single-bond geometry to one U(1) atom. In the third O site, O(6) is bonded in a bent 150 degrees geometry to one U(2) and one W(1) atom. In the fourth O site, O(7) is bonded in a single-bond geometry to one U(1) atom. In the fifth O site, O(8) is bonded in a single-bond geometry to one U(2) atom. In the sixth O site, O(9) is bonded in a single-bond geometry to one U(2) atom. In the seventh O site, O(1) is bonded in a 3-coordinate geometry to two equivalent U(1) and one W(1) atom. In the eighth O site, O(10) is bonded in a single-bond geometry to one U(2) atom. In the ninth O site, O(2) is bonded in a bent 150 degrees geometry to one U(1) and one W(1) atom. In the tenth O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one U(1) and two equivalent W(1) atoms. There are two inequivalent F sites. In the first F site, F(2) is bonded in a linear geometry to two equivalent U(1) atoms. In the second F site, F(1) is bonded in a bent 120 degrees geometry to two equivalent U(2) atoms. is represented by the CIF card [CIF]
data_U3W2O17F2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.025
_cell_length_b   11.025
_cell_length_c   10.036
_cell_angle_alpha   68.856
_cell_angle_beta   68.856
_cell_angle_gamma   102.180
_symmetry_Int_Tables_number   1
_cell_volume   976.109
_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
  U  U0  1  0.299  0.800  0.653  1.0
  U  U1  1  0.800  0.299  0.653  1.0
  U  U2  1  0.701  0.200  0.347  1.0
  U  U3  1  0.200  0.701  0.347  1.0
  U  U4  1  0.171  0.171  0.884  1.0
  U  U5  1  0.829  0.829  0.116  1.0
  W  W6  1  0.003  0.473  0.848  1.0
  W  W7  1  0.473  0.003  0.848  1.0
  W  W8  1  0.997  0.527  0.152  1.0
  W  W9  1  0.527  0.997  0.152  1.0
  O  O10  1  0.125  0.632  0.636  1.0
  O  O11  1  0.632  0.125  0.636  1.0
  O  O12  1  0.875  0.368  0.364  1.0
  O  O13  1  0.368  0.875  0.364  1.0
  O  O14  1  0.865  0.375  0.821  1.0
  O  O15  1  0.375  0.865  0.821  1.0
  O  O16  1  0.135  0.625  0.179  1.0
  O  O17  1  0.625  0.135  0.179  1.0
  O  O18  1  0.890  0.392  0.089  1.0
  O  O19  1  0.392  0.890  0.089  1.0
  O  O20  1  0.110  0.608  0.911  1.0
  O  O21  1  0.608  0.110  0.911  1.0
  O  O22  1  0.877  0.593  0.853  1.0
  O  O23  1  0.593  0.877  0.853  1.0
  O  O24  1  0.123  0.407  0.147  1.0
  O  O25  1  0.407  0.123  0.147  1.0
  O  O26  1  0.399  0.692  0.645  1.0
  O  O27  1  0.692  0.399  0.645  1.0
  O  O28  1  0.601  0.308  0.355  1.0
  O  O29  1  0.308  0.601  0.355  1.0
  O  O30  1  0.110  0.369  0.845  1.0
  O  O31  1  0.369  0.110  0.845  1.0
  O  O32  1  0.890  0.631  0.155  1.0
  O  O33  1  0.631  0.890  0.155  1.0
  O  O34  1  0.194  0.904  0.661  1.0
  O  O35  1  0.904  0.194  0.661  1.0
  O  O36  1  0.806  0.096  0.339  1.0
  O  O37  1  0.096  0.806  0.339  1.0
  O  O38  1  0.157  0.157  0.073  1.0
  O  O39  1  0.843  0.843  0.927  1.0
  O  O40  1  0.384  0.384  0.736  1.0
  O  O41  1  0.616  0.616  0.264  1.0
  O  O42  1  0.195  0.195  0.687  1.0
  O  O43  1  0.805  0.805  0.313  1.0
  F  F44  1  0.925  0.075  0.000  1.0
  F  F45  1  0.075  0.925  0.000  1.0
  F  F46  1  0.500  0.000  0.500  1.0
  F  F47  1  0.000  0.500  0.500  1.0
[/CIF]
.
The material structure described by U3W2O17F2 crystallizes in the monoclinic C2/m space group. 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(7), two equivalent O(1), and one F(2) atom to form distorted UO6F pentagonal bipyramids that share corners with three equivalent W(1)O6 octahedra,  a cornercorner with one U(1)O6F pentagonal bipyramid,  an edgeedge with one W(1)O6 octahedra, and  an edgeedge with one U(1)O6F pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 31-40°. In the second U site, U(2) is bonded to one O(10), one O(8), one O(9), two equivalent O(6), and two equivalent F(1) atoms to form distorted UO5F2 pentagonal bipyramids that share corners with two equivalent W(1)O6 octahedra and  an edgeedge with one U(2)O5F2 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 20°. W(1) is bonded to one O(1), one O(2), one O(4), one O(6), and two equivalent O(3) atoms to form distorted WO6 octahedra that share  a cornercorner with one U(2)O5F2 pentagonal bipyramid, corners with three equivalent U(1)O6F pentagonal bipyramids,  an edgeedge with one W(1)O6 octahedra, and  an edgeedge with one U(1)O6F pentagonal bipyramid. There are ten inequivalent O sites. In the first O site, O(4) is bonded in a single-bond geometry to one W(1) atom. In the second O site, O(5) is bonded in a single-bond geometry to one U(1) atom. In the third O site, O(6) is bonded in a bent 150 degrees geometry to one U(2) and one W(1) atom. In the fourth O site, O(7) is bonded in a single-bond geometry to one U(1) atom. In the fifth O site, O(8) is bonded in a single-bond geometry to one U(2) atom. In the sixth O site, O(9) is bonded in a single-bond geometry to one U(2) atom. In the seventh O site, O(1) is bonded in a 3-coordinate geometry to two equivalent U(1) and one W(1) atom. In the eighth O site, O(10) is bonded in a single-bond geometry to one U(2) atom. In the ninth O site, O(2) is bonded in a bent 150 degrees geometry to one U(1) and one W(1) atom. In the tenth O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one U(1) and two equivalent W(1) atoms. There are two inequivalent F sites. In the first F site, F(2) is bonded in a linear geometry to two equivalent U(1) atoms. In the second F site, F(1) is bonded in a bent 120 degrees geometry to two equivalent U(2) atoms. is represented by the CIF card [CIF]
data_U3W2O17F2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.025
_cell_length_b   11.025
_cell_length_c   10.036
_cell_angle_alpha   68.856
_cell_angle_beta   68.856
_cell_angle_gamma   102.180
_symmetry_Int_Tables_number   1
_cell_volume   976.109
_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
  U  U0  1  0.299  0.800  0.653  1.0
  U  U1  1  0.800  0.299  0.653  1.0
  U  U2  1  0.701  0.200  0.347  1.0
  U  U3  1  0.200  0.701  0.347  1.0
  U  U4  1  0.171  0.171  0.884  1.0
  U  U5  1  0.829  0.829  0.116  1.0
  W  W6  1  0.003  0.473  0.848  1.0
  W  W7  1  0.473  0.003  0.848  1.0
  W  W8  1  0.997  0.527  0.152  1.0
  W  W9  1  0.527  0.997  0.152  1.0
  O  O10  1  0.125  0.632  0.636  1.0
  O  O11  1  0.632  0.125  0.636  1.0
  O  O12  1  0.875  0.368  0.364  1.0
  O  O13  1  0.368  0.875  0.364  1.0
  O  O14  1  0.865  0.375  0.821  1.0
  O  O15  1  0.375  0.865  0.821  1.0
  O  O16  1  0.135  0.625  0.179  1.0
  O  O17  1  0.625  0.135  0.179  1.0
  O  O18  1  0.890  0.392  0.089  1.0
  O  O19  1  0.392  0.890  0.089  1.0
  O  O20  1  0.110  0.608  0.911  1.0
  O  O21  1  0.608  0.110  0.911  1.0
  O  O22  1  0.877  0.593  0.853  1.0
  O  O23  1  0.593  0.877  0.853  1.0
  O  O24  1  0.123  0.407  0.147  1.0
  O  O25  1  0.407  0.123  0.147  1.0
  O  O26  1  0.399  0.692  0.645  1.0
  O  O27  1  0.692  0.399  0.645  1.0
  O  O28  1  0.601  0.308  0.355  1.0
  O  O29  1  0.308  0.601  0.355  1.0
  O  O30  1  0.110  0.369  0.845  1.0
  O  O31  1  0.369  0.110  0.845  1.0
  O  O32  1  0.890  0.631  0.155  1.0
  O  O33  1  0.631  0.890  0.155  1.0
  O  O34  1  0.194  0.904  0.661  1.0
  O  O35  1  0.904  0.194  0.661  1.0
  O  O36  1  0.806  0.096  0.339  1.0
  O  O37  1  0.096  0.806  0.339  1.0
  O  O38  1  0.157  0.157  0.073  1.0
  O  O39  1  0.843  0.843  0.927  1.0
  O  O40  1  0.384  0.384  0.736  1.0
  O  O41  1  0.616  0.616  0.264  1.0
  O  O42  1  0.195  0.195  0.687  1.0
  O  O43  1  0.805  0.805  0.313  1.0
  F  F44  1  0.925  0.075  0.000  1.0
  F  F45  1  0.075  0.925  0.000  1.0
  F  F46  1  0.500  0.000  0.500  1.0
  F  F47  1  0.000  0.500  0.500  1.0
[/CIF]
.