亜鉛ジフルオリド

解説フッ化亜鉛ZnF2(103.39)．亜鉛塩水溶液にフッ化ナトリウム水溶液を加えると四水和物が得られる．無水物は四水和物をフッ化水素中で脱水すると得られる．無色の針状結晶．密度4.84 g cm－3．融点872 ℃．アンモニアに可溶，水，酸に微溶．ほうろう，うわぐすり，めっき，触媒，フッ素化剤，白アリ駆除剤などに用いられる．毒物．

説明Zinc fluoride (ZnF2) is an inorganic chemical compound. Zinc fluoride is used in the fluorination of organic compounds, in the manufacturing of phosphors for fluorescent lights, in preserving wood, in electroplating baths, in galvanizing steel, and in ceramic manufacturing for glazes and enamels. It is also used as a termite repellent, in pharmaceuticals (e.g. the inhibition of dentin demineralization and collagen degradation), as a flux for welding and soldering (e.g. aluminum).

使用Zinc fluoride is a white crystalline powder, used in the manufacture of phosphors for fluorescent lights. It also is used in electroplating baths, in preservation of wood, in glazes and enamels for ceramics, and in fluorination reactions of organics.

製造方法Zinc fluoride may be prepared by heating zinc hydroxide or zinc carbonate with hydrogen fluoride: Zn(OH)2 + 2HF → ZnF2 + 2H2O ZnCO3 + 2HF → ZnF2 + CO2 + H2O Also, it can be precipitated by adding a solution of sodium fluoride to that of zinc acetate: (CH3COO)2Zn + 2NaF → ZnF2 + 2CH3COONa

純化方法A possible impurity is H2O which can be removed by heating at 100o or by heating to 800o in a dry atmosphere. Heating in the presence of NH4F produces larger crystals. It is sparingly soluble in H2O (1.51g/100mL) but more soluble in HCl, HNO3 and NH4OH. It can be stored in glass bottles. [Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 242 1963.]