The material described by Y7O6F9 crystallizes in the monoclinic C2 space group. There are seven inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(5), one O(6), one F(1), one F(3), and one F(4) atom. In the second Y site, Y(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(5), one O(6), one F(2), one F(3), and one F(4) atom. In the third Y site, Y(3) is bonded in a 7-coordinate geometry to one O(5), one O(6), one O(7), one F(3), one F(5), one F(6), and one F(8) atom. In the fourth Y site, Y(4) is bonded in a 7-coordinate geometry to one O(5), one O(6), one O(7), one F(4), one F(5), one F(6), and one F(8) atom. In the fifth Y site, Y(5) is bonded in a 8-coordinate geometry to two equivalent O(7), one F(5), one F(6), two equivalent F(7), and two equivalent F(8) atoms. In the sixth Y site, Y(6) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one F(1), one F(10), one F(2), and one F(9) atom. In the seventh Y site, Y(7) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one F(1), one F(10), one F(2), and one F(9) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Y(1), one Y(2), one Y(6), and one Y(7) atom to form a mixture of edge and corner-sharing OY4 tetrahedra. In the second O site, O(2) is bonded to one Y(1), one Y(2), one Y(6), and one Y(7) atom to form a mixture of edge and corner-sharing OY4 tetrahedra. In the third O site, O(3) is bonded to two equivalent Y(6) and two equivalent Y(7) atoms to form a mixture of edge and corner-sharing OY4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Y(6) and two equivalent Y(7) atoms to form a mixture of edge and corner-sharing OY4 tetrahedra. In the fifth O site, O(5) is bonded to one Y(1), one Y(2), one Y(3), and one Y(4) atom to form OY4 tetrahedra that share corners with two equivalent O(2)Y4 tetrahedra, corners with two equivalent F(8)Y4 tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra,  an edgeedge with one O(7)Y4 tetrahedra, and edges with two equivalent O(6)Y4 tetrahedra. In the sixth O site, O(6) is bonded to one Y(1), one Y(2), one Y(3), and one Y(4) atom to form OY4 tetrahedra that share corners with two equivalent O(1)Y4 tetrahedra, corners with two equivalent O(7)Y4 tetrahedra,  an edgeedge with one O(2)Y4 tetrahedra,  an edgeedge with one F(8)Y4 tetrahedra, and edges with two equivalent O(5)Y4 tetrahedra. In the seventh O site, O(7) is bonded to one Y(3), one Y(4), and two equivalent Y(5) atoms to form OY4 tetrahedra that share corners with two equivalent O(6)Y4 tetrahedra, corners with two equivalent O(7)Y4 tetrahedra,  an edgeedge with one O(5)Y4 tetrahedra, and edges with three equivalent F(8)Y4 tetrahedra. There are ten inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to one Y(1), one Y(6), and one Y(7) atom. In the second F site, F(2) is bonded in a distorted trigonal planar geometry to one Y(2), one Y(6), and one Y(7) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Y(1), one Y(2), and one Y(3) atom. In the fourth F site, F(4) is bonded in a distorted trigonal planar geometry to one Y(1), one Y(2), and one Y(4) atom. In the fifth F site, F(5) is bonded in a trigonal planar geometry to one Y(3), one Y(4), and one Y(5) atom. In the sixth F site, F(6) is bonded in a distorted trigonal planar geometry to one Y(3), one Y(4), and one Y(5) atom. In the seventh F site, F(7) is bonded in a distorted bent 120 degrees geometry to two equivalent Y(5) atoms. In the eighth F site, F(8) is bonded to one Y(3), one Y(4), and two equivalent Y(5) atoms to form FY4 tetrahedra that share corners with two equivalent O(5)Y4 tetrahedra, corners with two equivalent F(8)Y4 tetrahedra,  an edgeedge with one O(6)Y4 tetrahedra, and edges with three equivalent O(7)Y4 tetrahedra. In the ninth F site, F(9) is bonded in a 2-coordinate geometry to two equivalent Y(6) and two equivalent Y(7) atoms. In the tenth F site, F(10) is bonded in a 2-coordinate geometry to two equivalent Y(6) and two equivalent Y(7) atoms. is represented by the CIF file [CIF]
data_Y7(O2F3)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   19.721
_cell_length_b   19.721
_cell_length_c   5.502
_cell_angle_alpha   89.928
_cell_angle_beta   89.928
_cell_angle_gamma   16.361
_symmetry_Int_Tables_number   1
_cell_volume   602.828
_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
  Y  Y0  1  0.674  0.114  0.299  1.0
  Y  Y1  1  0.886  0.326  0.701  1.0
  Y  Y2  1  0.169  0.619  0.702  1.0
  Y  Y3  1  0.381  0.831  0.298  1.0
  Y  Y4  1  0.543  0.104  0.708  1.0
  Y  Y5  1  0.896  0.457  0.292  1.0
  Y  Y6  1  0.069  0.578  0.289  1.0
  Y  Y7  1  0.422  0.931  0.711  1.0
  Y  Y8  1  0.545  0.956  0.277  1.0
  Y  Y9  1  0.044  0.455  0.723  1.0
  Y  Y10  1  0.706  0.223  0.707  1.0
  Y  Y11  1  0.777  0.294  0.293  1.0
  Y  Y12  1  0.207  0.722  0.292  1.0
  Y  Y13  1  0.278  0.793  0.708  1.0
  O  O14  1  0.449  0.408  0.479  1.0
  O  O15  1  0.592  0.551  0.521  1.0
  O  O16  1  0.948  0.908  0.521  1.0
  O  O17  1  0.092  0.052  0.479  1.0
  O  O18  1  0.979  0.021  0.500  1.0
  O  O19  1  0.479  0.521  0.500  1.0
  O  O20  1  0.356  0.358  0.470  1.0
  O  O21  1  0.642  0.644  0.530  1.0
  O  O22  1  0.854  0.856  0.529  1.0
  O  O23  1  0.144  0.146  0.471  1.0
  O  O24  1  0.299  0.268  0.464  1.0
  O  O25  1  0.732  0.701  0.536  1.0
  F  F26  1  0.850  0.021  0.035  1.0
  F  F27  1  0.979  0.150  0.965  1.0
  F  F28  1  0.349  0.521  0.964  1.0
  F  F29  1  0.479  0.651  0.036  1.0
  F  F30  1  0.487  0.252  0.946  1.0
  F  F31  1  0.748  0.513  0.054  1.0
  F  F32  1  0.993  0.747  0.057  1.0
  F  F33  1  0.253  0.007  0.943  1.0
  F  F34  1  0.683  0.929  0.090  1.0
  F  F35  1  0.071  0.317  0.910  1.0
  F  F36  1  0.173  0.440  0.910  1.0
  F  F37  1  0.560  0.827  0.090  1.0
  F  F38  1  0.413  0.085  0.893  1.0
  F  F39  1  0.915  0.587  0.107  1.0
  F  F40  1  0.802  0.770  0.548  1.0
  F  F41  1  0.230  0.198  0.452  1.0
  F  F42  1  0.582  0.418  0.000  1.0
  F  F43  1  0.083  0.917  0.000  1.0
[/CIF]
.
The material described by Y7O6F9 crystallizes in the monoclinic C2 space group. There are seven inequivalent Y sites. In the first Y site, Y(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(5), one O(6), one F(1), one F(3), and one F(4) atom. In the second Y site, Y(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(5), one O(6), one F(2), one F(3), and one F(4) atom. In the third Y site, Y(3) is bonded in a 7-coordinate geometry to one O(5), one O(6), one O(7), one F(3), one F(5), one F(6), and one F(8) atom. In the fourth Y site, Y(4) is bonded in a 7-coordinate geometry to one O(5), one O(6), one O(7), one F(4), one F(5), one F(6), and one F(8) atom. In the fifth Y site, Y(5) is bonded in a 8-coordinate geometry to two equivalent O(7), one F(5), one F(6), two equivalent F(7), and two equivalent F(8) atoms. In the sixth Y site, Y(6) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one F(1), one F(10), one F(2), and one F(9) atom. In the seventh Y site, Y(7) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one F(1), one F(10), one F(2), and one F(9) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Y(1), one Y(2), one Y(6), and one Y(7) atom to form a mixture of edge and corner-sharing OY4 tetrahedra. In the second O site, O(2) is bonded to one Y(1), one Y(2), one Y(6), and one Y(7) atom to form a mixture of edge and corner-sharing OY4 tetrahedra. In the third O site, O(3) is bonded to two equivalent Y(6) and two equivalent Y(7) atoms to form a mixture of edge and corner-sharing OY4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Y(6) and two equivalent Y(7) atoms to form a mixture of edge and corner-sharing OY4 tetrahedra. In the fifth O site, O(5) is bonded to one Y(1), one Y(2), one Y(3), and one Y(4) atom to form OY4 tetrahedra that share corners with two equivalent O(2)Y4 tetrahedra, corners with two equivalent F(8)Y4 tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra,  an edgeedge with one O(7)Y4 tetrahedra, and edges with two equivalent O(6)Y4 tetrahedra. In the sixth O site, O(6) is bonded to one Y(1), one Y(2), one Y(3), and one Y(4) atom to form OY4 tetrahedra that share corners with two equivalent O(1)Y4 tetrahedra, corners with two equivalent O(7)Y4 tetrahedra,  an edgeedge with one O(2)Y4 tetrahedra,  an edgeedge with one F(8)Y4 tetrahedra, and edges with two equivalent O(5)Y4 tetrahedra. In the seventh O site, O(7) is bonded to one Y(3), one Y(4), and two equivalent Y(5) atoms to form OY4 tetrahedra that share corners with two equivalent O(6)Y4 tetrahedra, corners with two equivalent O(7)Y4 tetrahedra,  an edgeedge with one O(5)Y4 tetrahedra, and edges with three equivalent F(8)Y4 tetrahedra. There are ten inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to one Y(1), one Y(6), and one Y(7) atom. In the second F site, F(2) is bonded in a distorted trigonal planar geometry to one Y(2), one Y(6), and one Y(7) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Y(1), one Y(2), and one Y(3) atom. In the fourth F site, F(4) is bonded in a distorted trigonal planar geometry to one Y(1), one Y(2), and one Y(4) atom. In the fifth F site, F(5) is bonded in a trigonal planar geometry to one Y(3), one Y(4), and one Y(5) atom. In the sixth F site, F(6) is bonded in a distorted trigonal planar geometry to one Y(3), one Y(4), and one Y(5) atom. In the seventh F site, F(7) is bonded in a distorted bent 120 degrees geometry to two equivalent Y(5) atoms. In the eighth F site, F(8) is bonded to one Y(3), one Y(4), and two equivalent Y(5) atoms to form FY4 tetrahedra that share corners with two equivalent O(5)Y4 tetrahedra, corners with two equivalent F(8)Y4 tetrahedra,  an edgeedge with one O(6)Y4 tetrahedra, and edges with three equivalent O(7)Y4 tetrahedra. In the ninth F site, F(9) is bonded in a 2-coordinate geometry to two equivalent Y(6) and two equivalent Y(7) atoms. In the tenth F site, F(10) is bonded in a 2-coordinate geometry to two equivalent Y(6) and two equivalent Y(7) atoms. is represented by the CIF file [CIF]
data_Y7(O2F3)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   19.721
_cell_length_b   19.721
_cell_length_c   5.502
_cell_angle_alpha   89.928
_cell_angle_beta   89.928
_cell_angle_gamma   16.361
_symmetry_Int_Tables_number   1
_cell_volume   602.828
_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
  Y  Y0  1  0.674  0.114  0.299  1.0
  Y  Y1  1  0.886  0.326  0.701  1.0
  Y  Y2  1  0.169  0.619  0.702  1.0
  Y  Y3  1  0.381  0.831  0.298  1.0
  Y  Y4  1  0.543  0.104  0.708  1.0
  Y  Y5  1  0.896  0.457  0.292  1.0
  Y  Y6  1  0.069  0.578  0.289  1.0
  Y  Y7  1  0.422  0.931  0.711  1.0
  Y  Y8  1  0.545  0.956  0.277  1.0
  Y  Y9  1  0.044  0.455  0.723  1.0
  Y  Y10  1  0.706  0.223  0.707  1.0
  Y  Y11  1  0.777  0.294  0.293  1.0
  Y  Y12  1  0.207  0.722  0.292  1.0
  Y  Y13  1  0.278  0.793  0.708  1.0
  O  O14  1  0.449  0.408  0.479  1.0
  O  O15  1  0.592  0.551  0.521  1.0
  O  O16  1  0.948  0.908  0.521  1.0
  O  O17  1  0.092  0.052  0.479  1.0
  O  O18  1  0.979  0.021  0.500  1.0
  O  O19  1  0.479  0.521  0.500  1.0
  O  O20  1  0.356  0.358  0.470  1.0
  O  O21  1  0.642  0.644  0.530  1.0
  O  O22  1  0.854  0.856  0.529  1.0
  O  O23  1  0.144  0.146  0.471  1.0
  O  O24  1  0.299  0.268  0.464  1.0
  O  O25  1  0.732  0.701  0.536  1.0
  F  F26  1  0.850  0.021  0.035  1.0
  F  F27  1  0.979  0.150  0.965  1.0
  F  F28  1  0.349  0.521  0.964  1.0
  F  F29  1  0.479  0.651  0.036  1.0
  F  F30  1  0.487  0.252  0.946  1.0
  F  F31  1  0.748  0.513  0.054  1.0
  F  F32  1  0.993  0.747  0.057  1.0
  F  F33  1  0.253  0.007  0.943  1.0
  F  F34  1  0.683  0.929  0.090  1.0
  F  F35  1  0.071  0.317  0.910  1.0
  F  F36  1  0.173  0.440  0.910  1.0
  F  F37  1  0.560  0.827  0.090  1.0
  F  F38  1  0.413  0.085  0.893  1.0
  F  F39  1  0.915  0.587  0.107  1.0
  F  F40  1  0.802  0.770  0.548  1.0
  F  F41  1  0.230  0.198  0.452  1.0
  F  F42  1  0.582  0.418  0.000  1.0
  F  F43  1  0.083  0.917  0.000  1.0
[/CIF]
.