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Properties of substance:

iron(II) fluoride

Synonyms:

ferrous fluoride

Group of substances:

inorganic

Physical appearance:

white tetragonal crystals

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

F2Fe

Structural formula as text:

FeF2

Molar/atomic mass: 93.84

Melting point (°C):

1100

Solubility (g/100 g of solvent):

diethyl ether: insoluble [Ref.]
ethanol: insoluble [Ref.]
hydrogen fluoride : 0.005 (-22.5°C) [Ref.]
hydrogen fluoride : 0.005 (-4.5°C) [Ref.]
hydrogen fluoride : 0.006 (11.8°C) [Ref.]
water: sparingly soluble [Ref.]

Density:

4 (20°C, g/cm3)

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

-661 (s)

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

-618.5 (s)

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

87.03 (s)

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

68.12 (s)

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

-345 (g)

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

273 (g)

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

52.3 (g)

Neel temperature (K):

78

References:

  1. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 64 [Russian]
  2. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1001 [Russian]
  3. Физические величины. - Под ред. Григорьева И.С., Мейлихова Е.З. - М.: Энергоатомиздат, 1991. - pp. 672 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru