Rb2KScF6 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent F(3), three equivalent F(1), and three equivalent F(2) atoms. K(1) is bonded to two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms to form KF6 octahedra that share corners with six equivalent Sc(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 22-25°. Sc(1) is bonded to two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms to form ScF6 octahedra that share corners with six equivalent K(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 22-25°. There are three inequivalent F sites. In the first F site, F(1) is bonded in a 5-coordinate geometry to three equivalent Rb(1), one K(1), and one Sc(1) atom. In the second F site, F(2) is bonded in a 5-coordinate geometry to three equivalent Rb(1), one K(1), and one Sc(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one K(1), and one Sc(1) atom.
Rb2KScF6 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent F(3), three equivalent F(1), and three equivalent F(2) atoms. There is one shorter (2.80 Å) and one longer (2.88 Å) Rb(1)-F(3) bond length. There are a spread of Rb(1)-F(1) bond distances ranging from 2.80-3.15 Å. There are a spread of Rb(1)-F(2) bond distances ranging from 2.82-3.13 Å. K(1) is bonded to two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms to form KF6 octahedra that share corners with six equivalent Sc(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 22-25°. Both K(1)-F(1) bond lengths are 2.57 Å. Both K(1)-F(2) bond lengths are 2.55 Å. Both K(1)-F(3) bond lengths are 2.55 Å. Sc(1) is bonded to two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms to form ScF6 octahedra that share corners with six equivalent K(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 22-25°. Both Sc(1)-F(1) bond lengths are 2.02 Å. Both Sc(1)-F(2) bond lengths are 2.02 Å. Both Sc(1)-F(3) bond lengths are 2.02 Å. There are three inequivalent F sites. In the first F site, F(1) is bonded in a 5-coordinate geometry to three equivalent Rb(1), one K(1), and one Sc(1) atom. In the second F site, F(2) is bonded in a 5-coordinate geometry to three equivalent Rb(1), one K(1), and one Sc(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one K(1), and one Sc(1) atom.