Er2Au

Er₂Au is an intermetallic compound combining erbium (a rare-earth element) with gold, forming a brittle metallic phase typically studied in rare-earth–precious-metal systems. This material belongs to the family of rare-earth intermetallics and is primarily of research interest rather than established industrial production, with potential applications in high-temperature materials, magnetic devices, and advanced alloy development where rare-earth strengthening and gold's corrosion resistance may be exploited together.