Rb2KScF6 crystallizes in the tetragonal I4/m space group. Rb(1) is bonded in a 8-coordinate geometry to four equivalent F(1) and four equivalent F(2) atoms. K(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form KF6 octahedra that share corners with six equivalent Sc(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 0-27°. Sc(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form ScF6 octahedra that share corners with six equivalent K(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 0-27°. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one K(1), and one Sc(1) atom. In the second F site, F(2) is bonded in a distorted linear geometry to four equivalent Rb(1), one K(1), and one Sc(1) atom.
Rb2KScF6 crystallizes in the tetragonal I4/m space group. Rb(1) is bonded in a 8-coordinate geometry to four equivalent F(1) and four equivalent F(2) atoms. All Rb(1)-F(1) bond lengths are 2.85 Å. All Rb(1)-F(2) bond lengths are 3.15 Å. K(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form KF6 octahedra that share corners with six equivalent Sc(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 0-27°. Both K(1)-F(2) bond lengths are 2.53 Å. All K(1)-F(1) bond lengths are 2.54 Å. Sc(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form ScF6 octahedra that share corners with six equivalent K(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 0-27°. Both Sc(1)-F(2) bond lengths are 2.02 Å. All Sc(1)-F(1) bond lengths are 2.02 Å. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one K(1), and one Sc(1) atom. In the second F site, F(2) is bonded in a distorted linear geometry to four equivalent Rb(1), one K(1), and one Sc(1) atom.