Materials Data on ScSe3(NO4)3 by Materials Project

Abstract

(Sc(SeO4)3)2(N2)3 crystallizes in the trigonal R3 space group. The structure is one-dimensional and consists of eighteen ammonia molecules and three Sc(SeO4)3 ribbons oriented in the (0, 0, 1) direction. In each Sc(SeO4)3 ribbon, there are two inequivalent Sc3+ sites. In the first Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with six SeO4 tetrahedra. There are three shorter (2.09 Å) and three longer (2.10 Å) Sc–O bond lengths. In the second Sc3+ site, Sc3+ is bonded to six O2- atoms to form ScO6 octahedra that share corners with six SeO4 tetrahedra. All Sc–O bond lengths are 2.10 Å. There are two inequivalent Se2+ sites. In the first Se2+ site, Se2+ is bonded to four O2- atoms to form SeO4 tetrahedra that share corners with two ScO6 octahedra. The corner-sharing octahedra tilt angles range from 36–37°. There are a spread of Se–O bond distances ranging from 1.66–1.69 Å. In the second Se2+ site, Se2+ is bonded to four O2- atoms to form SeO4 tetrahedra that share corners with two ScO6 octahedra. The corner-sharing octahedra tilt angles range from 36–37°. There is one shorter (1.67 Å) and three longer (1.68 Å) Se–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Se2+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Sc3+ and one Se2+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Sc3+ and one Se2+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one Se2+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Sc3+ and one Se2+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Sc3+ and one Se2+ atom. In the seventh O2- site, O2- is bonded in a single-bond geometry to one Se2+ atom. In the eighth O2- site, O2- is bonded in a single-bond geometry to one Se2+ atom.