YO2F crystallizes in the monoclinic Pm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), one F(1), and one F(2) atom. In the second Y site, Y(2) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(1), two equivalent F(1), and two equivalent F(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Y(2) and two equivalent Y(1) atoms. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Y(2) and two equivalent Y(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Y(2) and two equivalent Y(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms. In the second F site, F(2) is bonded in a trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms.
YO2F crystallizes in the monoclinic Pm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), one F(1), and one F(2) atom. The Y(1)-O(1) bond length is 2.41 Å. Both Y(1)-O(2) bond lengths are 2.32 Å. Both Y(1)-O(3) bond lengths are 2.30 Å. Both Y(1)-O(4) bond lengths are 2.46 Å. The Y(1)-F(1) bond length is 2.30 Å. The Y(1)-F(2) bond length is 2.37 Å. In the second Y site, Y(2) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(1), two equivalent F(1), and two equivalent F(2) atoms. The Y(2)-O(2) bond length is 2.25 Å. The Y(2)-O(3) bond length is 2.41 Å. The Y(2)-O(4) bond length is 2.32 Å. Both Y(2)-O(1) bond lengths are 2.56 Å. Both Y(2)-F(1) bond lengths are 2.37 Å. Both Y(2)-F(2) bond lengths are 2.37 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Y(2) and two equivalent Y(1) atoms. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Y(2) and two equivalent Y(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Y(2) and two equivalent Y(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms. In the second F site, F(2) is bonded in a trigonal non-coplanar geometry to one Y(1) and two equivalent Y(2) atoms.