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nature : Periodic System III ethnic group vice-La elements, a rare-earth element. Atomic number 58. Stable isotopes : 136,138,140,142. Amu 140.116. The gray metal. There stretchability. Density : Crystal 6.9 square; The six-party Crystal 6.7. 799 ° C melting point. Boiling Point 3426 ° C Chemical properties and lively. Heating fire in the air generated cerium oxide. Acid soluble and insoluble base. With the role of boiling water.化合?3?4?Three price salt colorless. Four salt orange prices. Four-yellow oxide price.用于制铈化合物（都有毒?）?铈合金（如引火合金）、特种玻璃?军用标记、照相发光物、合成氨催化剂等?Found primarily in the living rock. Cerium oxide can be reduced using magnesium powder, or 3 cerium fluoride with calcium reduction, or by the electrolysis of molten CeCl3 and prepared.
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