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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):
F
6
W
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/cm
3
)
0.0129 (20°C, g/cm
3
)
Vapour pressure (Torr):
1 (-71.7°C)
10 (-49.2°C)
100 (-21.1°C)
Viscosity (mPa·s):
0.019 (17.3°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-1721.5 (g)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-1635.9 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
353.5 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
120.5 (g)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-1746.8 (l)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
265 (l)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
4.1
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
25.9
Critical temperature (°C):
171
Critical pressure (MPa):
4.4
References:
CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-97
Houben-Weyl Methods in Organic Chemistry. - vol.E-10a: ORGANOFLUORINE COMPOUNDS. - Thieme Verlag, Stuttgart, 1998. - pp. 683-684
Journal of the Chemical Society. - 1957. - pp. 4778-4781 [DOI:
10.1039/JR9570004778
]
Nakajima T., Zemva B., Tressaud A. Advanced inorganic fluorides: Syntesis, Characterization and Applications. - Elsevier, 2000. - pp. 642
Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 110-111 [Russian]
Зеликман А.Н., Никитина Л.С. Вольфрам. - М.: Металлургия, 1978. - pp. 109-111 [Russian]
Каров З.Г., Мохосоев М.В. Растворимость и свойства растворов соединений молибдена и вольфрама. - Новосибирск: ВО Наука, 1993. - pp. 298-300 [Russian]
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 374 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 60 [Russian]
Фтор и его соединения. – Под ред. Саймонса Дж., Т. 1. - М.: ИИЛ, 1953. - pp. 101-102 [Russian]
Фторидный процесс получения вольфрама. - М.: Наука, 1981. - pp. 31-40 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru