Structural properties investigation of different alumina polymorphs (η-, γ-, χ-, θ-, α-Al2O3) using Cr3+ as a luminescent probe

Abstract The structural properties of η-, γB-, γPb-, χ-, θ- and α-Al2O3 polymorphs were studied by X-ray diffraction and photoluminescence spectroscopy using Cr3+ ion as a luminescent probe in its natural concentration (