There are normal salts and hydrogen salts (ammonium hydrogen fluoride). [Ammonium fluoride (normal salt)] Chemical formula: NH 4 F. It can be precipitated by adding ammonia to ice-cold hydrofluoric acid, or by heating a 4:9 mixture of ammonium chloride and sodium fluoride, or an equivalent mixture of ammonium sulfate and calcium fluoride, and then sublimated. Colorless hexagonal columnar crystals. Specific gravity: 1.009 (25°C). Refractive index: 1.315. It is deliquescent. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
正塩と水素塩(フッ化水素アンモニウムammonium hydrogenfluoride)がある。 [フッ化アンモニウム(正塩)] 化学式NH4F。氷冷したフッ化水素酸にアンモニアを通じて析出させるか,塩化アンモニウムとフッ化ナトリウムの4:9混合物または硫酸アンモニウムとフッ化カルシウムの当量混合物を加熱し,昇華物として得られる。無色六方晶系の柱状晶。比重1.009(25℃)。屈折率1.315。潮解性がある。 出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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