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Properties of substance:

manganese(III) oxide

Group of substances:

inorganic

Physical appearance:

rhombic crystals

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

Mn2O3

Structural formula as text:

Mn2O3

Molar/atomic mass: 157.87

Decomposition temperature (°C):

750

CAS №: 1317-34-6

Solubility (g/100 g of solvent):

acetic acid: insoluble [Ref.]
boron oxide molten: 0.4 (900°C) [Ref.]
hydrogen fluoride : insoluble [Ref.]
water: insoluble [Ref.]

Density:

4.5 (20°C, g/cm3)

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

-957.7 (s)

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

-879.9 (s)

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

110.5 (s)

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

107.5 (s)

Neel temperature (K):

80

References:

  1. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 154-155 [Russian]
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 79 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru