硝酸ベリリウム

解説硝酸ベリリウム,三水和物は無色，あるいは，かすかに黄色を帯びた結晶．密度1.59 g cm－3．融点60 ℃．100 ℃ で分解して2Be(NO3)2･BeOを生じ，無水物は得られない．潮解性で，水，エタノールに易溶，アセトンに不溶．発光しやすい．森北出版「化学辞典（第2版）

用途白熱灯の酸化ベリリウム導入剤に用いられる．

説明Beryllium nitrate is said to have the molecular formula of Be(NO3)2 and the molecular weight of grams per mole. It is very soluble in water. It could be prepared by the action of nitric acid on beryllium carbonate, oxide or hydroxide: BeCO3 + 2HNO3 Be(NO3)2 + CO2 +H2O Be(OH)2 + 2HNO3 Be(NO3)2 + 2H2O It is described as Be(NO3)2·4H2O, a compound that forms colorless, deliquescent crystals that are soluble in water, and used to introduce beryllium oxide into materials used in incandescent mantles. However, in view of recent developments concerning the behavior of the Be3+ cation in solution, the more likely reactions are: BeCO3 + 2HNO3 Be(OH)NO3 + CO2 + 1/2H2O Be(OH)2 + 2HNO3 Be(OH)NO3 + 3/2H2O

使用Beryllium nitrate is used as a hardening agent for mantles on gas lanterns.

製造方法Anhydrous beryllium nitrate has been prepared by the reaction of anhydrous beryllium chloride with an ethylacetate-dinitrogen tetroxide mixture to give Be(NO3)2 · 2N2O4 [Addison and Walker 1963]. When heated above 50 °C (120 °F) in a vacuum, oxides of nitrogen are evolved, leaving anhydrous beryllium nitrate. The anhydrous salt is stable to approximately 125 °C (255 °F), when a sudden decomposition occurs to give nitrogen tetroxide and a volatile compound that separates from the gas phase as colorless Be4O(NO3)6 crystals. These crystals are slowly hydrolyzed when added to water.