(ThEr2F10)2O2 crystallizes in the tetragonal I4/mmm space group. The structure consists of four water atoms inside a ThEr2F10 framework. In the ThEr2F10 framework, Th(1) is bonded in a 8-coordinate geometry to four equivalent F(1) and four equivalent F(3) atoms. Er(1) is bonded in a 8-coordinate geometry to two equivalent F(2), two equivalent F(3), and four equivalent F(1) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to one Th(1) and two equivalent Er(1) atoms. In the second F site, F(2) is bonded in a bent 150 degrees geometry to two equivalent Er(1) atoms. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Th(1) and one Er(1) atom.
(ThEr2F10)2O2 crystallizes in the tetragonal I4/mmm space group. The structure consists of four water atoms inside a ThEr2F10 framework. In the ThEr2F10 framework, Th(1) is bonded in a 8-coordinate geometry to four equivalent F(1) and four equivalent F(3) atoms. All Th(1)-F(1) bond lengths are 2.47 Å. All Th(1)-F(3) bond lengths are 2.28 Å. Er(1) is bonded in a 8-coordinate geometry to two equivalent F(2), two equivalent F(3), and four equivalent F(1) atoms. Both Er(1)-F(2) bond lengths are 2.17 Å. Both Er(1)-F(3) bond lengths are 2.25 Å. All Er(1)-F(1) bond lengths are 2.36 Å. There are three inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to one Th(1) and two equivalent Er(1) atoms. In the second F site, F(2) is bonded in a bent 150 degrees geometry to two equivalent Er(1) atoms. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Th(1) and one Er(1) atom.