Grade ceramic soil analysis identified components

Rare earth elements from the eighteenth century began to discover, when people often water-insoluble solid oxide called earth. General state of the rare earth oxide is separated out, and very rare, which was called the rare earths. Usually lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, cerium group called light rare earth or rare earths; the gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium yttrium yttrium group called heavy rare earths or rare earths. Also some similarities and differences based on physical and chemical properties of rare earth elements, in addition to scandium (Sc some will be placed under the scattered elements), divided into three groups, namely light rare earth group of lanthanum, cerium, praseodymium, neodymium, promethium; Rare Earth group of samarium, europium, gadolinium, terbium, dysprosium; heavy rare earth group, holmium, erbium, thulium, ytterbium, lutetium, yttrium. Company: Shenzhen Universal rare earth ore testing laboratory testing authority Tel :( Miss Han) 13538212153 Online QQ exchange: 2664618914 Address: Futian District nosy four Qing'an Aviation Building 1013