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Properties of substance:

hafnium(IV) chloride

Group of substances:

inorganic

Physical appearance:

white cubic crystals

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

Cl4Hf

Structural formula as text:

HfCl4

Molar/atomic mass: 300.3

Sublimation point (°C):

315

Solubility (g/100 g of solvent):

acetonitrile: 25.6 (25°C) [Ref.]
diisoamyl ether: 11.7 (25°C) [Ref.]
ethanol: soluble with reaction [Ref.]
methanol: soluble with reaction [Ref.]
nitrobenzene: very soluble [Ref.]
water: reaction [Ref.]

Hygroscopic:

yes

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

22.8

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

103.1

Standard molar enthalpy (heat) of formation ΔfH (298 K, kJ/mol)

-990.353 (s) [Ref.]
-885.711 (g) [Ref.]

Standard molar Gibbs energy of formation ΔfG (298 K, kJ/mol)

-901.169 (s) [Ref.]
-850.774 (g) [Ref.]

Standard molar entropy S (298 K, J/(mol·K))

190.665 (s) [Ref.]
372.611 (g) [Ref.]

Molar heat capacity at constant pressure Cp (298 K, J/(mol·K))

120.509 (s) [Ref.]
98.944 (g) [Ref.]

LD50 (mg/kg):

2000 (white rats, oral)

References:

  1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-66
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 61 [Russian]
  3. Шека И.А., Карлышева К.Ф. Химия гафния. - Киев: Наукова думка, 1973. - pp. 179-196 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru