Guangxi metal component analysis

Universal Detection of ore testing center Tel: 13652308850 Miss Liu Website:??? Www.szhycjs.com online QQ: 2205829980 Address:????????????????? Shenzhen Futian District nosy four Qing'an Building, Room 503 collectively rare earth elements of the Periodic Table Group IIIB of yttrium and the lanthanides. Which is man-made radioactive element promethium. They are very reactive metal. Properties are very similar. Common +3 valence its hydrated ions are mostly color. Easy to form stable coordination compounds. Solvent extraction and ion exchange is the preferred method for separating rare earths. Lanthanum, cerium, praseodymium, neodymium and other light rare earth metal. Due to the low melting point. In the process of electrolysis in the molten state may be deposited on the cathode. Therefore, generally using electrolytic Preparation. Available in two salt-based chlorine and fluoride. The former rare earth chloride is added to the cell material. In the form of the latter to join oxides. ??? Is the periodic table of rare earth lanthanide - lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), Gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium is closely related to 15 elements (Lu)., and the lanthanides The two elements - scandium (Sc) and yttrium (Y) a total of 17 elements known as rare earth elements. Usually lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium called light rare earth elements (cerium group rare earths). Gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, yttrium called heavy rare earth elements (Yttrium Group RE).