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|Section2= |Section3= |Section7= |Section8= }} Vanadium(III) fluoride is the chemical compound with the formula VF3. This yellow-green, refractory solid is obtained in a two-step procedure from V2O3.〔Sturm, B. J.; Sheridan, C. W. "Vanadium(III) Fluoride" Inorganic Syntheses 1963; Vol. 7, pages 52-54. ISBN 0-88275-165-4.〕 Similar to other transition-metal fluorides (such as MnF2), it exhibits magnetic ordering at low temperatures (e.g. V2F6.4H2O orders below 12 K〔S. Nakhal et al., Z. Kristallogr. 228, 347 (2013).〕). ==Preparation== The first step entails conversion to the hexafluorovanadate(III) salt using ammonium bifluoride: :V2O3 + 6 (NH4)HF2 → 2 (NH4)3VF6 + 3 H2O In the second step, the hexafluorovanadate is thermally decomposed. :(NH4)3VF6 → 3 NH3 + 3 HF + VF3 The thermal decomposition of ammonium salts is a relatively common method for the preparation of inorganic solids. VF3 can also be prepared by treatment of V2O3 with HF. VF3 is a crystalline solid with 6 coordinate vanadium atoms with bridging fluorine atoms. The magnetic moment indicates the presence of two unpaired electrons. 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「Vanadium(III) fluoride」の詳細全文を読む スポンサード リンク
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