Materials Data on Sc(SeO5)2 by Materials Project

Sc(SeO4)2O2 crystallizes in the triclinic P-1 space group. The structure is two-dimensional and consists of two water molecules and one Sc(SeO4)2 sheet oriented in the (0, 0, 1) direction. In the Sc(SeO4)2 sheet, Sc is bonded to six O atoms to form ScO6 octahedra that share corners with six equivalent SeO4 tetrahedra. There are two shorter (2.09 Å) and four longer (2.12 Å) Sc–O bond lengths. Se is bonded to four O atoms to form SeO4 tetrahedra that share corners with three equivalent ScO6 octahedra. The corner-sharing octahedra tilt angles range from 33–45°. There is two shorter (1.67 Å) and two longer (1.68 Å) Se–O bond length. There are four inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one Sc and one Se atom. In the second O site, O is bonded in a distorted bent 150 degrees geometry to one Sc and one Se atom. In the third O site, O is bonded in a single-bond geometry to one Se atom. In the fourth O site, O is bonded in a bent 150 degrees geometry to one Sc and one Se atom.