Materials Data on Pr2NiO4 by Materials Project
Pr2NiO4 is Orthorhombic Perovskite-like structured and crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. Pr3+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are a spread of Pr–O bond distances ranging from 2.32–2.79 Å. Ni2+ is bonded to six O2- atoms to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles are 14°. There are four shorter (1.99 Å) and two longer (2.24 Å) Ni–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to four equivalent Pr3+ and one Ni2+ atom. In the second O2- site, O2- is bonded in a 6-coordinate geometry to four equivalent Pr3+ and two equivalent Ni2+ atoms.
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