DOI: 10.17188/1731653
title: Materials Data on MgTi3ZnNiO9 by Materials Project

description: MgTi3NiZnO9 is Ilmenite-derived structured and crystallizes in the trigonal P3 space group. The structure is three-dimensional. there are two inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form distorted MgO6 octahedra that share corners with nine TiO6 octahedra, edges with three equivalent NiO6 octahedra, and a faceface with one TiO6 octahedra. The corner-sharing octahedra tilt angles range from 46–60°. There are three shorter (2.07 Å) and three longer (2.17 Å) Mg–O bond lengths. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form distorted MgO6 octahedra that share corners with nine TiO6 octahedra, edges with three equivalent NiO6 octahedra, and a faceface with one TiO6 octahedra. The corner-sharing octahedra tilt angles range from 46–60°. There are three shorter (2.07 Å) and three longer (2.17 Å) Mg–O bond lengths. There are six inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to six O2- atoms to form distorted TiO6 octahedra that share corners with three equivalent NiO6 octahedra, corners with six ZnO6 octahedra, edges with three equivalent TiO6 octahedra, and a faceface with one MgO6 octahedra. The corner-sharing octahedra tilt angles range from 45–61°. There are three shorter (1.88 Å) and three longer (2.12 Å) Ti–O bond lengths. In the second Ti4+ site, Ti4+ is bonded to six O2- atoms to form distorted TiO6 octahedra that share corners with three equivalent MgO6 octahedra, corners with three equivalent NiO6 octahedra, corners with three equivalent ZnO6 octahedra, edges with three equivalent TiO6 octahedra, and a faceface with one ZnO6 octahedra. The corner-sharing octahedra tilt angles range from 45–60°. There is three shorter (1.88 Å) and three longer (2.11 Å) Ti–O bond length. In the third Ti4+ site, Ti4+ is bonded to six O2- atoms to form distorted TiO6 octahedra that share corners with three equivalent MgO6 octahedra, corners with six NiO6 octahedra, edges with three equivalent TiO6 octahedra, and a faceface with one MgO6 octahedra. The corner-sharing octahedra tilt angles range from 45–60°. There are three shorter (1.88 Å) and three longer (2.13 Å) Ti–O bond lengths. In the fourth Ti4+ site, Ti4+ is bonded to six O2- atoms to form distorted TiO6 octahedra that share corners with three equivalent MgO6 octahedra, corners with three equivalent NiO6 octahedra, corners with three equivalent ZnO6 octahedra, edges with three equivalent TiO6 octahedra, and a faceface with one ZnO6 octahedra. The corner-sharing octahedra tilt angles range from 46–60°. There are three shorter (1.88 Å) and three longer (2.13 Å) Ti–O bond lengths. In the fifth Ti4+ site, Ti4+ is bonded to six O2- atoms to form distorted TiO6 octahedra that share corners with three equivalent MgO6 octahedra, corners with six ZnO6 octahedra, edges with three equivalent TiO6 octahedra, and a faceface with one NiO6 octahedra. The corner-sharing octahedra tilt angles range from 45–60°. There are three shorter (1.88 Å) and three longer (2.13 Å) Ti–O bond lengths. In the sixth Ti4+ site, Ti4+ is bonded to six O2- atoms to form distorted TiO6 octahedra that share corners with three equivalent NiO6 octahedra, corners with six MgO6 octahedra, edges with three equivalent TiO6 octahedra, and a faceface with one NiO6 octahedra. The corner-sharing octahedra tilt angles range from 46–60°. There are three shorter (1.88 Å) and three longer (2.14 Å) Ti–O bond lengths. There are two inequivalent Ni2+ sites. In the first Ni2+ site, Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with nine TiO6 octahedra, edges with three equivalent MgO6 octahedra, and a faceface with one TiO6 octahedra. The corner-sharing octahedra tilt angles range from 45–60°. There are three shorter (2.08 Å) and three longer (2.14 Å) Ni–O bond lengths. In the second Ni2+ site, Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with nine TiO6 octahedra, edges with three equivalent MgO6 octahedra, and a faceface with one TiO6 octahedra. The corner-sharing octahedra tilt angles range from 45–60°. There are three shorter (2.08 Å) and three longer (2.14 Å) Ni–O bond lengths. There are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to six O2- atoms to form distorted ZnO6 octahedra that share corners with nine TiO6 octahedra, edges with three equivalent ZnO6 octahedra, and a faceface with one TiO6 octahedra. The corner-sharing octahedra tilt angles range from 45–61°. There are three shorter (2.04 Å) and three longer (2.25 Å) Zn–O bond lengths. In the second Zn2+ site, Zn2+ is bonded to six O2- atoms to form distorted ZnO6 octahedra that share corners with nine TiO6 octahedra, edges with three equivalent ZnO6 octahedra, and a faceface with one TiO6 octahedra. The corner-sharing octahedra tilt angles range from 45–60°. There are three shorter (2.05 Å) and three longer (2.23 Å) Zn–O bond lengths. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded to two Ti4+ and two Zn2+ atoms to form a mixture of distorted edge and corner-sharing OTi2Zn2 trigonal pyramids. In the second O2- site, O2- is bonded to one Mg2+, two Ti4+, and one Ni2+ atom to form a mixture of distorted edge and corner-sharing OMgTi2Ni trigonal pyramids. In the third O2- site, O2- is bonded to one Mg2+, two Ti4+, and one Ni2+ atom to form a mixture of distorted edge and corner-sharing OMgTi2Ni trigonal pyramids. In the fourth O2- site, O2- is bonded in a distorted see-saw-like geometry to one Mg2+, two Ti4+, and one Ni2+ atom. In the fifth O2- site, O2- is bonded in a distorted see-saw-like geometry to one Mg2+, two Ti4+, and one Ni2+ atom. In the sixth O2- site, O2- is bonded to two Ti4+ and two Zn2+ atoms to form a mixture of distorted edge and corner-sharing OTi2Zn2 trigonal pyramids.