ErCrO4 is Zircon-like structured and crystallizes in the tetragonal I4_1/a space group. Er(1) is bonded in a 8-coordinate geometry to eight equivalent O(1) atoms. Cr(1) is bonded in a tetrahedral geometry to four equivalent O(1) atoms. O(1) is bonded in a distorted trigonal planar geometry to two equivalent Er(1) and one Cr(1) atom.
ErCrO4 is Zircon-like structured and crystallizes in the tetragonal I4_1/a space group. Er(1) is bonded in a 8-coordinate geometry to eight equivalent O(1) atoms. There are four shorter (2.32 Å) and four longer (2.40 Å) Er(1)-O(1) bond lengths. Cr(1) is bonded in a tetrahedral geometry to four equivalent O(1) atoms. All Cr(1)-O(1) bond lengths are 1.73 Å. O(1) is bonded in a distorted trigonal planar geometry to two equivalent Er(1) and one Cr(1) atom.