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Properties of substance:

cobalt(II) iodide

Group of substances:

inorganic

Physical appearance:

black trigonal crystals

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

CoI2

Structural formula as text:

CoI2

Molar/atomic mass: 312.74

Melting point (°C):

515

Boiling point (°C):

570

Decomposition temperature (°C):

570

Solubility (g/100 g of solvent):

acetone: very soluble [Ref.]
ethanol: very soluble [Ref.]
sulfur dioxide: 0.382 (0°C) [Ref.]
water: 159 (0°C) [Ref.]
water: 197 (25°C) [Ref.]
water: 420 (100°C) [Ref.]

Density:

5.68 (20°C, g/cm3)

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

-102.1 (s)

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

-97.5 (s)

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

158.2 (s)

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

106.7 (g)

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

340 (g)

Neel temperature (K):

3

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 419
  2. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 140-141 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 73 [Russian]
  4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 352 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1008 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru