Materials Data on Ni3TeO6 by Materials Project

Abstract

Ni3TeO6 is Ilmenite-like structured and crystallizes in the trigonal R3 space group. The structure is three-dimensional. there are three inequivalent Ni+2.67+ sites. In the first Ni+2.67+ site, Ni+2.67+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with nine NiO6 octahedra, edges with three equivalent TeO6 octahedra, and a faceface with one NiO6 octahedra. The corner-sharing octahedra tilt angles range from 47–63°. There are three shorter (2.05 Å) and three longer (2.11 Å) Ni–O bond lengths. In the second Ni+2.67+ site, Ni+2.67+ is bonded to six O2- atoms to form distorted NiO6 octahedra that share corners with three equivalent NiO6 octahedra, corners with six equivalent TeO6 octahedra, edges with three equivalent NiO6 octahedra, and a faceface with one NiO6 octahedra. The corner-sharing octahedra tilt angles range from 43–63°. There are three shorter (2.03 Å) and three longer (2.21 Å) Ni–O bond lengths. In the third Ni+2.67+ site, Ni+2.67+ is bonded to six O2- atoms to form distorted NiO6 octahedra that share corners with three equivalent TeO6 octahedra, corners with six equivalent NiO6 octahedra, edges with three equivalent NiO6 octahedra, and a faceface with one TeO6 octahedra. The corner-sharing octahedra tilt angles range from 47–58°. There are three shorter (2.06 Å) and three longer (2.16 Å) Ni–O bond lengths. Te4+ is bonded to six O2- atoms to form TeO6 octahedra that share corners with nine NiO6 octahedra, edges with three equivalent NiO6 octahedra, and a faceface with one NiO6 octahedra. The corner-sharing octahedra tilt angles range from 43–58°. There is three shorter (1.95 Å) and three longer (1.98 Å) Te–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Ni+2.67+ and one Te4+ atom. In the second O2- site, O2- is bonded to three Ni+2.67+ and one Te4+ atom to form a mixture of distorted edge and corner-sharing ONi3Te trigonal pyramids.