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氟化钡靶材(BaF2)

氟化钡靶材(BaF2)
  • 氟化钡靶材(BaF2)
氟化钡靶材(BaF2)essential information
Molecular formulaBaF2
purity99.99%
CAS No7787-32-8
Molar mass175.324
density4.89 g/cm³
melting point1354 ℃
boiling point2260 ℃
Solubility (water)溶于盐酸、硝酸、氢氟酸和氯化铵溶液,难溶于水

氟化钡靶材(BaF2)Product overview

氟化钡是碱土氟化物晶体,无色透明,属于立方晶体系,面心立方结构型。是配位型晶体,每个钡原子周围有八个氟离子包围,构成阴离子立方休结构基元,而F被四个Ba所环绕构成四面体结构基元,Ba位于立方面心格位呈紧密堆积。
固态氟化钡为萤石型晶体结构,立方晶系。高压下转变为氯化铅型结构。
气态时,以 BaF2分子的形式存在,F-Ba-F键角约为108°,与价层电子对互斥理论的预测相矛盾。 从头计算的结果显示这是钡原子的d轨道参与的结果。 也有理论认为这是由钡内层电子的极化作用,在钡原子周围产生四面体型的电荷分布,并与Ba-F键发生作用造成的。


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