La2YEr

La₂YEr is a rare-earth oxide ceramic compound combining lanthanum, yttrium, and erbium. This material belongs to the family of rare-earth ceramics that are typically investigated for high-temperature applications, optical properties, and thermal barrier coatings where chemical stability and refractory performance are critical. While primarily a research composition rather than a widely commercialized engineering material, rare-earth ceramics of this type are explored for advanced aerospace, nuclear, and solid-state laser applications where conventional oxides reach performance limits.