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Properties of substance:

tungsten(VI) fluoride

Synonyms:

tungsten hexafluoride

Group of substances:

inorganic

Physical appearance:

colorless gas

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

F6W

Structural formula as text:

WF6

Molar/atomic mass: 297.8304

Melting point (°C):

2.5

Boiling point (°C):

17.3

Solubility (g/100 g of solvent):

benzene: soluble [Ref.]
carbon tetrachloride: very soluble [Ref.]
cyclohexane: very soluble [Ref.]
hydrogen fluoride : 24.07 (-10°C) [Ref.]
uranium(VI) fluoride: 42.9 (70°C) [Ref.]
water: reaction [Ref.]

Density:

3.44 (17°C, g/cm3)
0.0129 (20°C, g/cm3)

Vapour pressure (Torr):

1 (-71.7°C)
10 (-49.2°C)
100 (-21.1°C)

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

-1721.5 (g)

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

-1635.9 (g)

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

353.5 (g)

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

120.5 (g)

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

-1746.8 (l)

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

265 (l)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

4.1

Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

25.9

Critical temperature (°C):

171

Critical pressure (MPa):

4.4

References:

  1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-97
  2. Houben-Weyl Methods in Organic Chemistry. - vol.E-10a: ORGANOFLUORINE COMPOUNDS. - Thieme Verlag, Stuttgart, 1998. - pp. 683-684
  3. Journal of the Chemical Society. - 1957. - pp. 4778-4781 [DOI: 10.1039/JR9570004778]
  4. Nakajima T., Zemva B., Tressaud A. Advanced inorganic fluorides: Syntesis, Characterization and Applications. - Elsevier, 2000. - pp. 642
  5. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 110-111 [Russian]
  6. Зеликман А.Н., Никитина Л.С. Вольфрам. - М.: Металлургия, 1978. - pp. 109-111 [Russian]
  7. Каров З.Г., Мохосоев М.В. Растворимость и свойства растворов соединений молибдена и вольфрама. - Новосибирск: ВО Наука, 1993. - pp. 298-300 [Russian]
  8. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 374 [Russian]
  9. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 60 [Russian]
  10. Фтор и его соединения. – Под ред. Саймонса Дж., Т. 1. - М.: ИИЛ, 1953. - pp. 101-102 [Russian]
  11. Фторидный процесс получения вольфрама. - М.: Наука, 1981. - pp. 31-40 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru