Rb2ScSi4O10F crystallizes in the tetragonal I4/m space group. Rb(1) is bonded in a 10-coordinate geometry to one O(1), four equivalent O(2), four equivalent O(3), and one F(2) atom. Sc(1) is bonded to four equivalent O(2), one F(1), and one F(2) atom to form ScO4F2 octahedra that share corners with two equivalent Sc(1)O4F2 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedra are not tilted. Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form SiO4 tetrahedra that share  a cornercorner with one Sc(1)O4F2 octahedra and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 25°. There are three inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1), one Sc(1), and one Si(1) atom. In the second O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1) and two equivalent Si(1) atoms. In the third O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Rb(1) and two equivalent Si(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a linear geometry to two equivalent Sc(1) atoms. In the second F site, F(2) is bonded in a distorted linear geometry to four equivalent Rb(1) and two equivalent Sc(1) atoms.
Rb2ScSi4O10F crystallizes in the tetragonal I4/m space group. Rb(1) is bonded in a 10-coordinate geometry to one O(1), four equivalent O(2), four equivalent O(3), and one F(2) atom. The Rb(1)-O(1) bond length is 3.08 Å. There are two shorter (2.98 Å) and two longer (3.00 Å) Rb(1)-O(2) bond lengths. There are two shorter (3.04 Å) and two longer (3.34 Å) Rb(1)-O(3) bond lengths. The Rb(1)-F(2) bond length is 3.08 Å. Sc(1) is bonded to four equivalent O(2), one F(1), and one F(2) atom to form ScO4F2 octahedra that share corners with two equivalent Sc(1)O4F2 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedra are not tilted. All Sc(1)-O(2) bond lengths are 2.10 Å. The Sc(1)-F(1) bond length is 2.05 Å. The Sc(1)-F(2) bond length is 2.17 Å. Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form SiO4 tetrahedra that share  a cornercorner with one Sc(1)O4F2 octahedra and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 25°. The Si(1)-O(1) bond length is 1.65 Å. The Si(1)-O(2) bond length is 1.59 Å. There is one shorter (1.65 Å) and one longer (1.66 Å) Si(1)-O(3) bond length. There are three inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1), one Sc(1), and one Si(1) atom. In the second O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1) and two equivalent Si(1) atoms. In the third O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Rb(1) and two equivalent Si(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a linear geometry to two equivalent Sc(1) atoms. In the second F site, F(2) is bonded in a distorted linear geometry to four equivalent Rb(1) and two equivalent Sc(1) atoms.