Rb3GdF6 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to four equivalent F(1) atoms. In the second Rb site, Rb(2) is bonded in a linear geometry to two equivalent F(2) atoms. Gd(1) is bonded in an octahedral geometry to two equivalent F(2) and four equivalent F(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a trigonal planar geometry to two equivalent Rb(1) and one Gd(1) atom. In the second F site, F(2) is bonded in a linear geometry to one Rb(2) and one Gd(1) atom.
Rb3GdF6 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to four equivalent F(1) atoms. All Rb(1)-F(1) bond lengths are 2.81 Å. In the second Rb site, Rb(2) is bonded in a linear geometry to two equivalent F(2) atoms. Both Rb(2)-F(2) bond lengths are 2.58 Å. Gd(1) is bonded in an octahedral geometry to two equivalent F(2) and four equivalent F(1) atoms. Both Gd(1)-F(2) bond lengths are 2.26 Å. All Gd(1)-F(1) bond lengths are 2.22 Å. There are two inequivalent F sites. In the first F site, F(1) is bonded in a trigonal planar geometry to two equivalent Rb(1) and one Gd(1) atom. In the second F site, F(2) is bonded in a linear geometry to one Rb(2) and one Gd(1) atom.