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Properties of substance:

silicon nitride

Group of substances:

inorganic

Physical appearance:

colorless hexagonal crystals

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

N4Si3

Structural formula as text:

Si3N4

Molar/atomic mass: 140.28

Melting point (°C):

1900

Solubility (g/100 g of solvent):

water: insoluble [Ref.]

Numerical data:

Year of discovery: 1844
Vickers hardness (GPa): 45.3

Density:

3.44 (20°C, g/cm3)

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

    -750 (s)

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

    -647.7 (s)

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

    95.4 (s)

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

    99.87 (s)

    References:

    1. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 591 [Russian]
    2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 74 [Russian]
    3. Самсонов Г.В. Нитриды. – Киев: Наукова думка, 1969. - pp. 282-294 [Russian]
    4. Успехи химии. - 1995. - Т.64, №4. - pp. 311-329 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru