Used in high-strength permanent magnets, especially in combination with neodymium and iron for applications in electric motors, wind turbines, and hard disk drives. Enhances the performance and thermal stability of neodymium-based magnets. Employed in mischmetal for lighter flints due to its pyrophoric properties. Added to glass and ceramics to produce yellow, green, or rose-colored pigments. Used in didymium glass for protective goggles in welding and glassblowing to filter out harmful sodium glare. Applied in fiber optics as a dopant in amplifiers for signal boosting in telecommunications. Utilized in heat-resistant alloys for aerospace and defense components. Plays a role in catalytic converters and petroleum cracking catalysts. Investigated for use in energy storage systems and advanced battery technologies.