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Properties of substance:

caesium iodide

Synonyms:

cesium iodide

Group of substances:

inorganic

Physical appearance:

colorless cubic crystals

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

CsI

Structural formula as text:

CsI

Molar/atomic mass: 259.81

Melting point (°C):

621

Boiling point (°C):

1280

Solubility (g/100 g of solvent):

acetone: 0.159 (18°C) [Ref.]
acetone: 0.139 (37°C) [Ref.]
acetonitrile: 0.76 (18°C) [Ref.]
acetonitrile: 0.99 (25°C) [Ref.]
ammonia liquid : 151.7 (0°C) [Ref.]
ethanol: soluble [Ref.]
formic acid: 28.1 (18°C) [Ref.]
formic acid: 29.5 (25°C) [Ref.]
furfural : sparingly soluble [Ref.]
hydrazine: soluble [Ref.]
methanol: 3.05 (18°C) [Ref.]
methanol: 3.79 (25°C) [Ref.]
nitrobenzene: sparingly soluble [Ref.]
nitromethane: sparingly soluble [Ref.]
water: 44.1 (0°C) [Ref.]
water: 67.5 (15°C) [Ref.]
water: 85.6 (25°C) [Ref.]
water: 122.8 (50°C) [Ref.]
water: 170.8 (75°C) [Ref.]

Density:

4.51 (20°C, g/cm3)

Refractive index (nD):

1.7876 (20°C)

Vapour pressure (Torr):

1 (737°C)
10 (872°C)
100 (1056°C)

Dipole moment (D):

10.2 (600°C)

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

-253.1 (s)

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

-333.5 (s)

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

130 (s)

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

51.9 (s)

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

153 (g)

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

275.2 (g)

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

37.46 (g)

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

26

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

133

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 459-462
  2. Плющев В.Е., Степин Б.Д. Аналитическая химия рубидия и цезия. - М.: Наука, 1975. - pp. 22-27 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 111 [Russian]
  4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 734-735 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru