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Properties of substance:

thorium(IV) fluoride

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

F4Th

Structural formula as text:

ThF4

Molar/atomic mass: 308.03

Melting point (°C):

1050

Boiling point (°C):

1700

Solubility (g/100 g of solvent):

bromine trifluoride: insoluble (25°C) [Ref.]
hydrogen fluoride : 0.001 (-22.5°C) [Ref.]
hydrogen fluoride : 0.002 (-4.5°C) [Ref.]
hydrogen fluoride : 0.006 (11.8°C) [Ref.]
water: 0.000017 (20°C) [Ref.]

Density:

6.32 (24°C, g/cm3)

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

-2018.4 (s)

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

-1924.2 (s)

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

142.05 (s)

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

110.71 (s)

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

-1770 (g)

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

346 (g)

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

93 (g)

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

18.8

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

270.3

References:

  1. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 105 [Russian]
  2. Сонгина О.А. Редкие металлы. - 3 изд. - М.: Металлургия, 1964. - pp. 268-269 [Russian]
  3. Справочник по расплавленным солям. - Т. 1. - Л.: Химия, 1971. - pp. 19 [Russian]
  4. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1013 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru