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Properties of substance:

boron carbide

Group of substances:

inorganic

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 [Russian]
  3. Косолапова Т.Я. Карбиды. - М.: Металлургия, 1968. - pp. 188-192, 252-256 [Russian]
  4. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 14 [Russian]
  5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 56 [Russian]
  6. Физические величины. - Под ред. Григорьева И.С., Мейлихова Е.З. - М.: Энергоатомиздат, 1991. - pp. 358 [Russian]
  7. Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 300 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru