Materials Data on Er3Al3Cr2O12 by Materials Project
Er3Cr2Al3O12 crystallizes in the cubic Ia-3d space group. The structure is three-dimensional. Er3+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. There are four shorter (2.33 Å) and four longer (2.44 Å) Er–O bond lengths. Cr3+ is bonded to six equivalent O2- atoms to form CrO6 octahedra that share corners with six equivalent AlO4 tetrahedra. All Cr–O bond lengths are 2.03 Å. Al3+ is bonded to four equivalent O2- atoms to form AlO4 tetrahedra that share corners with four equivalent CrO6 octahedra. The corner-sharing octahedral tilt angles are 53°. All Al–O bond lengths are 1.79 Å. O2- is bonded in a 4-coordinate geometry to two equivalent Er3+, one Cr3+, and one Al3+ atom.
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