Materials Data on Dy2SeO2 by Materials Project

Abstract

Dy2O2Se crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Dy3+ is bonded in a 4-coordinate geometry to three equivalent Se2- and four equivalent O2- atoms. All Dy–Se bond lengths are 2.98 Å. All Dy–O bond lengths are 2.29 Å. Se2- is bonded to six equivalent Dy3+ atoms to form distorted SeDy6 octahedra that share corners with twelve equivalent ODy4 tetrahedra, edges with six equivalent SeDy6 octahedra, and edges with six equivalent ODy4 tetrahedra. O2- is bonded to four equivalent Dy3+ atoms to form ODy4 tetrahedra that share corners with six equivalent SeDy6 octahedra, corners with six equivalent ODy4 tetrahedra, edges with three equivalent SeDy6 octahedra, and edges with three equivalent ODy4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–48°.