Materials Data on Zn(NiO2)2 by Materials Project

Abstract

Zn(NiO2)2 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Ni3+ sites. In the first Ni3+ site, Ni3+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing NiO6 octahedra. The corner-sharing octahedra tilt angles range from 49–62°. There are a spread of Ni–O bond distances ranging from 1.91–2.01 Å. In the second Ni3+ site, Ni3+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing NiO6 octahedra. The corner-sharing octahedra tilt angles range from 49–62°. There are a spread of Ni–O bond distances ranging from 1.94–2.05 Å. Zn2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Zn–O bond distances ranging from 2.19–2.44 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to three equivalent Ni3+ and two equivalent Zn2+ atoms to form a mixture of distorted corner and edge-sharing OZn2Ni3 trigonal bipyramids. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three Ni3+ and two equivalent Zn2+ atoms. In the third O2- site, O2- is bonded to three equivalent Ni3+ and two equivalent Zn2+ atoms to form a mixture of distorted corner and edge-sharing OZn2Ni3 square pyramids. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to three Ni3+ and two equivalent Zn2+ atoms.