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|Section2= |Section3= |Section7= |Section8= }} Hafnium(IV) chloride is the inorganic compound with the formula HfCl4. This colourless solid is the precursor to most hafnium organometallic compounds. It has a variety of highly specialized applications, mainly in materials science and as a catalyst. ==Preparation== HfCl4 can be produced by several related procedures: *The reaction of carbon tetrachloride and hafnium oxide at above 450 °C; :HfO2 + 2 CCl4 → HfCl4 + 2 COCl2 *Chlorination of a mixture of HfO2 and carbon above 600 °C using chlorine gas or sulfur monochloride: :HfO2 + 2 Cl2 + C → HfCl4 + CO2 *Chlorination of hafnium carbide above 250 °C.〔Elinson, S. V. and Petrov, K. I. (1969) ''Analytical Chemistry of the Elements: Zirconium and Hafnium.'' 11.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hafnium tetrachloride」の詳細全文を読む スポンサード リンク
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