Used in the production of high-durability ceramics suitable for high-temperature environments, such as engine nozzles or furnace components.

Used as a host material in phosphors for LED applications, especially in trivalent europium-doped forms that emit red light.

Employed in scintillation detectors for medical imaging and radiation detection due to high density and effective X-ray absorption.

Serves as a catalyst in petroleum refining processes, particularly in alkylation and cracking reactions.

Utilized in specialized optical coatings and high-refractive-index glasses for laser and camera lens applications.

Investigated in cancer therapy as a carrier for radioactive isotopes in targeted radionuclide treatment.