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Properties of substance:

iron(III) hydroxide oxide

Group of substances:

inorganic

Physical appearance:

brown rhombic crystals

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

HFeO2

Structural formula as text:

FeOOH

Molar/atomic mass: 88.85

Decomposition temperature (°C):

136

Density:

4.28 (20°C, g/cm3)

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

-558 (s)

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

60.4 (s)

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

74.5 (s)

References:

  1. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 116-117 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru