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Properties of substance:

iron(III) fluoride

Synonyms:

ferric fluoride

Group of substances:

inorganic

Physical appearance:

green trigonal crystals

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

F3Fe

Structural formula as text:

FeF3

Molar/atomic mass: 112.84

Melting point (°C):

1027

Boiling point (°C):

1327

Solubility (g/100 g of solvent):

benzene: insoluble [Ref.]
diethyl ether: insoluble [Ref.]
ethanol: insoluble [Ref.]
hydrogen fluoride : 0.001 (-25.2°C) [Ref.]
hydrogen fluoride : 0.003 (-7.8°C) [Ref.]
hydrogen fluoride : 0.008 (11.9°C) [Ref.]
water: 0.091 (25°C) [Ref.]
water: soluble (100°C) [Ref.]

Multicomponent solubility (in wt%):

water 92.53%, ferric fluoride 7.32%, sodium fluoride 0.15%, 25 °C, separating phase: FeF3 * 3H2O + 2FeF3 * 5NaF [Ref.]
water 97.33%, ferric fluoride 2.51%, sodium fluoride 0.16%, 25 °C, separating phase: 2FeF3 * 5NaF [Ref.]
water 98.24%, ferric fluoride 1.58%, sodium fluoride 0.18%, 25 °C, separating phase: 2FeF3 * 5NaF [Ref.]
water 98.96%, ferric fluoride 0.84%, sodium fluoride 0.2%, 25 °C, separating phase: 2FeF3 * 5NaF [Ref.]
water 99.45%, ferric fluoride 0.34%, sodium fluoride 0.21%, 25 °C, separating phase: 2FeF3 * 5NaF [Ref.]
water 99.66%, ferric fluoride 0.12%, sodium fluoride 0.22%, 25 °C, separating phase: 2FeF3 * 5NaF [Ref.]
water 99.758%, ferric fluoride 0.012%, sodium fluoride 0.23%, 25 °C, separating phase: 2FeF3 * 5NaF [Ref.]
water 98.9996%, ferric fluoride 0.0004%, sodium fluoride 1.%, 25 °C, separating phase: 2FeF3 * 5NaF [Ref.]
water 93.85%, ferric fluoride 5.01%, hydrogen fluoride 1.14%, 25 °C, separating phase: FeF3 * 3H2O [Ref.]
water 90.68%, ferric fluoride 6.16%, hydrogen fluoride 3.16%, 25 °C, separating phase: FeF3 * 3H2O [Ref.]
water 82.04%, ferric fluoride 4.7%, hydrogen fluoride 13.26%, 25 °C, separating phase: FeF3 * 3H2O [Ref.]
water 69.35%, ferric fluoride 3.71%, hydrogen fluoride 26.94%, 25 °C, separating phase: FeF3 * 3H2O [Ref.]
water 44.6%, ferric fluoride 10.81%, hydrogen fluoride 44.59%, 25 °C, separating phase: FeF3 * 3H2O [Ref.]
water 37.27%, ferric fluoride 16.73%, hydrogen fluoride 46.%, 25 °C, separating phase: FeF3 * 3H2O + FeF3 * 3HF * 3H2O [Ref.]
water 36.85%, ferric fluoride 16.5%, hydrogen fluoride 46.65%, 25 °C, separating phase: FeF3 * 3HF * 3H2O [Ref.]
water 39.09%, ferric fluoride 8.22%, hydrogen fluoride 52.69%, 25 °C, separating phase: FeF3 * 3HF * 3H2O [Ref.]
water 27.96%, ferric fluoride 1.06%, hydrogen fluoride 70.98%, 25 °C, separating phase: FeF3 * 3HF * 3H2O [Ref.]
water 97.18%, ferric fluoride 2.3%, potassium fluoride 0.52%, 25 °C, separating phase: FeF3 * 3H2O + FeF3 * 2KF * H2O [Ref.]
water 98.43%, ferric fluoride 1.01%, potassium fluoride 0.56%, 25 °C, separating phase: FeF3 * 2KF * H2O [Ref.]
water 97.594%, ferric fluoride 0.006%, potassium fluoride 2.4%, 25 °C, separating phase: 4FeF3 * 11KF * 12H2O [Ref.]
water 96.808%, ferric fluoride 0.002%, potassium fluoride 3.19%, 25 °C, separating phase: 4FeF3 * 11KF * 12H2O [Ref.]

Density:

3.87 (20°C, g/cm3)

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

-1000 (s)

Neel temperature (K):

363

References:

  1. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 369 [Russian]
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 64 [Russian]
  3. Рысс И.Г. Химия фтора и его неорганических соединений. - М., 1956. - pp. 584 [Russian]
  4. Соросовский образовательный журнал. - 2000. - №8. - pp. 56 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1001 [Russian]
  6. Физические величины. - Под ред. Григорьева И.С., Мейлихова Е.З. - М.: Энергоатомиздат, 1991. - pp. 673 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru