Materials Data on Rh2O3 by Materials Project

Rh2O3 is Corundum-like structured and crystallizes in the orthorhombic Pbcn space group. The structure is three-dimensional. Rh3+ is bonded to six O2- atoms to form a mixture of face, edge, and corner-sharing RhO6 octahedra. The corner-sharing octahedra tilt angles range from 48–71°. There are a spread of Rh–O bond distances ranging from 2.02–2.14 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Rh3+ atoms to form a mixture of distorted edge and corner-sharing ORh4 trigonal pyramids. In the second O2- site, O2- is bonded to four equivalent Rh3+ atoms to form a mixture of distorted edge and corner-sharing ORh4 tetrahedra.