Used as a dopant in fiber optic cables to enhance signal amplification in telecommunications. Serves as a coloring agent in glasses, enamels, and ceramics, producing yellow to yellow-green hues. Employed in the production of special glasses for filtering specific light wavelengths, such as in engineering eyewear or radiation-protective goggles. Acts as an additive in magnetic materials to improve properties and in the electronics industry for manufacturing certain semiconductor devices. Utilized in catalytic converters for automotive exhaust systems to reduce emissions. Applied in the production of specialized lasers and phosphors for display technologies. Serves as a component in heat-resistant ceramics and coatings due to its thermal stability. Also used in research on luminescent materials and catalysts for specific chemical processes.