鉛(II)ジアザイド

化学的特性needles or white powder(s); prepared by reaction of dilute solutions of lead nitrate and sodium azide; used as a primary detonating compound for high explosives; α-Pb(N3)2: orthorhombic, a=0.663nm, b=0.546 nm, c=1.625nm; β-Pb(N3)3: monoclinic, a=0.509 nm, b=0.884nm, c=1.751 nm; γ-Pb(N3)2: a=0.622nm, b=1.051 nm, c=1.217 nm [MER06] [CIC73] [KIR78]

解説化学式Pb(N3)2。酢酸鉛(II)Pb(CH3COO)2とアジ化ナトリウムNaN3水溶液を混合すると，水に難溶性の無色の針状または粉末状の結晶として生成する。結晶には安定なα形(斜方晶系，比重4.71)と不安定なβ形(単斜晶系，比重4.93)の2形がある。熱水にはわずかに溶けるが徐々に分解してアンモニアを発生する。希硝酸，酢酸には溶ける。きわめて爆発性が強く，330℃程度に加熱するか，結晶を破砕したり摩擦するだけで水中でも爆発することがある。株式会社平凡社 世界大百科事典 第２版について 情報

説明Lead azide is a severe explosion risk and should be handled under water; it is also a primary detonating compound.

使用As primer in explosives. In the form of dextrinated lead azide.

一般的な説明Needles or white powder. Explodes at 350°C. Insoluble in water. May explode from shock, heat, flame or friction when dry. The primary hazard is the blast effect of an instantaneous explosion and not flying projectiles and fragments.

製造方法Lead azide is prepared by the reaction of sodium azide with lead nitrate: 2NaN3 + Pb(NO3)2 → Pb(N3)2 + 2NaNO3.

Lead azide crystallizes as colorless needles. It is a sensitive detonating agent, exploding at 350 °C. Lead azide is commonly prepared by the reaction between dilute solutions of lead nitrate and sodium azide. For safety, it is stirred vigorously to prevent formation of large crystals, which may detonate. Lead azide is usually precipitated with a protective material, such as gelatin, and then granulated. Lead azide is also used to prepare electrophotographic layers and for information storage on styrene–butadiene resins.