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Properties of substance:

niobium(II) oxide

Group of substances:

inorganic

Physical appearance:

black cubic crystals

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

NbO

Structural formula as text:

NbO

Molar/atomic mass: 108.91

Melting point (°C):

1940

Solubility (g/100 g of solvent):

water: insoluble [Ref.]

Density:

7.26 (20°C, g/cm3)

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

-406 (s)

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

-379.4 (s)

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

50.2 (s)

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

41.3 (s)

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

200 (g)

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

239 (g)

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

31 (g)

References:

  1. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 88 [Russian]
  2. Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 253 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru