Material Type: Erbium Metal Melting Point (C): 1497 C Symbol: Er Boiling Point (C): 2900 C Atomic Number: 68 Density: 9.05 gm/cm3 Erbium metal is a soft, malleable, lustrous, silvery rare earth metals belonging to the lanthanide group. It is stable in air, reacts very slowly with water and oxygen, a