Na2CuF4 crystallizes in the tetragonal I4/mmm space group. Na(1) is bonded in a 8-coordinate geometry to four equivalent F(1) and four equivalent F(2) atoms. Cu(1) is bonded in a square co-planar geometry to four equivalent F(1) atoms. There are two inequivalent F sites. In the first F site, F(2) is bonded to four equivalent Na(1) atoms to form a mixture of distorted corner and edge-sharing FNa4 tetrahedra. In the second F site, F(1) is bonded in a distorted linear geometry to four equivalent Na(1) and two equivalent Cu(1) atoms.
Na2CuF4 crystallizes in the tetragonal I4/mmm space group. Na(1) is bonded in a 8-coordinate geometry to four equivalent F(1) and four equivalent F(2) atoms. All Na(1)-F(1) bond lengths are 2.79 Å. All Na(1)-F(2) bond lengths are 2.19 Å. Cu(1) is bonded in a square co-planar geometry to four equivalent F(1) atoms. All Cu(1)-F(1) bond lengths are 1.97 Å. There are two inequivalent F sites. In the first F site, F(2) is bonded to four equivalent Na(1) atoms to form a mixture of distorted corner and edge-sharing FNa4 tetrahedra. In the second F site, F(1) is bonded in a distorted linear geometry to four equivalent Na(1) and two equivalent Cu(1) atoms.