Main page (Russian) Search in database (English)

Properties of substance:

boron nitride

Group of substances:

inorganic

Physical appearance:

colorless hexagonal crystals

Empirical formula (Hill's system for organic substances):

BN

Structural formula as text:

BN

Molar/atomic mass: 24.82

Melting point (°C):

3000

Solubility (g/100 g of solvent):

hydrazine: insoluble [Ref.]
water: insoluble [Ref.]

Numerical data:

Vickers hardness (GPa): 62

Density:

2.34 (20°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1]
    4BF3 * NH3 → 3NH4BF4 + BN

Reactions:

  1. Yeild 30%. [Ref.1]
    BN + 3IF → NI3 + BF3

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-252.6 (s)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

-226.8 (s)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

14.8 (s)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

19.7 (s)

References:

  1. Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 199 [Russian]
  2. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 13-14 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 56 [Russian]
  4. Самсонов Г.В. Нитриды. – Киев: Наукова думка, 1969. - pp. 231-259 [Russian]

    What information do you need?




    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru