Materials Data on HoCrO4 by Materials Project
HoCrO4 is Zircon-like structured and crystallizes in the tetragonal I4_1/a space group. The structure is three-dimensional. Ho3+ is bonded in a 8-coordinate geometry to eight equivalent O2- atoms. There are four shorter (2.33 Å) and four longer (2.41 Å) Ho–O bond lengths. Cr5+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All Cr–O bond lengths are 1.74 Å. O2- is bonded in a 3-coordinate geometry to two equivalent Ho3+ and one Cr5+ atom.