Neodymium, chemical symbol Nd, atomic number 60, is one of the lanthanide elements. It is a silver white metal and one of the most active rare earth metals. It has a melting point of 1024 ° C, a density of 7.004g/cm3, and paramagnetism. It can quickly darken in the air and generate oxides; React slowly in cold water and quickly in hot water. Neodymium doped yttrium aluminum garnet and neodymium glass can replace ruby as laser materials, while neodymium and praseodymium glass can be used as goggles. Neodymium plays an important role in the rare earth field and influences the rare earth market