窒化ベリリウム

窒化ベリリウム 化学特性,用途語,生産方法

• 説明

  Beryllium nitride has the molecular formula of Be3N2 and the molecular weight of 55.0652 g/mol. It can be prepared from the elements at high temperature (1100– 1500 °C). Be3N2 decomposes in vacuum into beryllium and nitrogen:
  3Be +N₂ → Be₃N₂
  It is a white to yellow powder with a density of 2.71 g/cm³. Its melting point is 2208 °C and a boiling point of 2240 °C. Its CAS number is 1304-54-7. It is soluble in water and is readily hydrolyzed forming beryllium hydroxide and ammonia:
  Be₃N₂ + 3H₂0₃→Be(OH)₂ + 2NH₃
  It has two polymorphic forms: cubic a-Be3N2 with a defect anti-bixbyite structure (a = 8.1452 ), and hexagonal β-Be3N2.

• 化学的特性

  triberyllium nitride is hard, refractory, white crystals. Readily attached by strong alkali solutions, liberating ammonia.

• 物理的性質

  Hard white or grayish crystal. Oxidizes in air above 600°C. Slowly decomposes in water, quickly in acids and alkalis with evolution of NH₃.

• 物理的性質

  Gray cubic crystal; hard and refractory; density 2.71 g/cm³; melts at 2,200°C; decomposes in acid or alkali; slowly reacts with water.

• 使用

  triberyllium nitride productions of the radioactive carbon isotope1 4C for tracer uses.

• 製造方法

  Beryllium nitride may be prepared by heating beryllium metal powder with dry nitrogen in an oxygen-free atmosphere above 700°C.
  3Be + N₂→Be₃N₂

• 危険性

  Chronic inhalation of the powder can cause cancer and adverse reproductive effects.

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1304-54-7, 窒化ベリリウム キーワード