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Properties of substance:

boron carbide

Physical appearance:

black trigonal crystals

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

CB4

Structural formula as text:

B4C

Molar/atomic mass: 55.25

Melting point (°C):

2350

Solubility (g/100 g of solvent):

water: insoluble [Ref.]

Numerical data:

Vickers hardness (GPa): 38
Thermal conductivity (W/m·K): 13
Thermal conductivity (W/m·K): 28

Density:

2.52 (20°C, g/cm3)

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

    -39 (s)

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

    27.1 (s)

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

    52.8 (s)

    References:

    1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-53
    2. Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 145
    3. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 14
    4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 56
    5. Физические величины. - Под ред. Григорьева И.С., Мейлихова Е.З. - М.: Энергоатомиздат, 1991. - pp. 358
    6. Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 300
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru