Samarium oxide 

 Chemical formula: Sm2O3 
 Appearance: light yellow powder, deliquescent, insoluble in water, soluble in inorganic acid. 
 Uses: used for making metal samarium, electronic device body, and magnetic materials. 
 Element symbol: Sm English Name: Samarium Chinese name: Sm 
 Relative atomic mass: 150.4 common valence: +2, +3 electronegativity: 1.17 
 External electronic arrangement: 4f6 6s2 arrangement of extranuclear: 2,8,18,24,8,2 
 Isotope and Radiation: Sm-144 Sm-145 [340d] Sm-146 [1.03E8y] Sm-147 (put α [1.06E11y]) Sm-148 (put α [7.0E15y]) Sm-149 (put α) Sm -150 Sm-151 [90y] * Sm-152 Sm-153 [1.92d] Sm-154 
 Electron affinity and energy: 0 KJ · mol-1 
 The first ionization energy: 543 KJ · mol-1 the second ionization energy: 1068 KJ · mol-1 third ionization energy: 0 KJ · mol-1 
 Elemental density: 7.54 g/cm3 melting point of a single mass: 1072.0 ℃ elemental boiling point: 1900.0 ℃ 
 Atomic radius: 2.59 Aye ionic radius: 1.08 (+3) Aye covalent radius: 1.62 angstroms 
 Common compounds: Unknown 
 That person: 布瓦博德朗 Time: 1879 Location: France 
 Name Origin: 
 Named after yttrium niobium ore (samarskite). 
 Element Description: 
 Silvery white rare earth metal. 
 Elements Source: 
 Coexist with other rare earth elements in monazite sands. Rare earth elements in monazite sand in the mass fraction is usually 50%, of which 2.8% samarium. 
 Elements Uses: 
 For electronic and ceramic industries. Samarium easy magnetization is difficult demagnetization, which means that future solid-state components and superconducting technology will have important applications 


 Yttrium oxide (Y2o3) 99.9% 280 元 / kg 99.99% 330 yuan / kg 
 Lanthanum oxide (La2o3) 99.9% 120 元 / kg 99.99% 150 yuan / kg 
 Cerium oxide (Ceo2) 99.9% 130 元 / kg 99.99% 320 yuan / kg 
 Praseodymium oxide (Pr6on) 99.9% 500 元 / kg 99.99% 700 yuan / kg 
 Neodymium oxide (Nd2o3) 99.9% 750 元 / kg 99.99% 1000 yuan / kg 
 Samarium oxide (Sm2o3) 99.9% 150 元 / kg 99.99% 260 yuan / kg 
 Europium oxide (Eu2o3) 99.9% 13500 元 / kg 99.99% 17500 yuan / kg 
 Gadolinium oxide (Gd2o3) 99.9% 320 元 / kg 99.99% 450 yuan / kg 
 Terbium oxide (Tb4o3) 99.9% 13500 元 / kg 99.99% 17000 yuan / kg 
 Dysprosium oxide (Dy2o3) 99.9% 8500 元 / kg 99.99% 11500 yuan / kg 
 Holmium oxide (Ho2o3) 99.9% 2800 元 / kg 99.99% 3500 yuan / kg 
 Erbium oxide (Er2o3) 99.9% 750 元 / kg 99.99% 1200 yuan / kg 
 Thulium oxide (Tm2o3) 99.9% 6500 元 / kg 99.99% 9500 yuan / kg 
 Ytterbium oxide (Yb2o3) 99.9% 350 元 / kg 99.99% 500 yuan / kg 
 Lutetium oxide (Lu2o3) 99.9% 12000 元 / kg 99.99% 14500 yuan / kg