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Properties of substance:

rubidium iodide

Group of substances:

inorganic

Physical appearance:

colorless cubic crystals

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

IRb

Structural formula as text:

RbI

Molar/atomic mass: 212.37

Melting point (°C):

642

Boiling point (°C):

1306

Solubility (g/100 g of solvent):

acetone: 3.92 (-78.5°C) [Ref.]
acetone: 2.3 (-40°C) [Ref.]
acetone: 1.16 (0°C) [Ref.]
acetone: 0.652 (18°C) [Ref.]
acetone: 0.495 (25°C) [Ref.]
acetonitrile: 1.84 (18°C) [Ref.]
acetonitrile: 1.68 (25°C) [Ref.]
ammonia liquid : 187 (0°C) [Ref.]
ethanol: soluble [Ref.]
formic acid: 46.1 (18°C) [Ref.]
formic acid: 47.4 (25°C) [Ref.]
furfural : 0.425 (25°C) [Ref.]
hydrazine: soluble [Ref.]
iodine liquid: very soluble [Ref.]
methanol: 11.1 (18°C) [Ref.]
methanol: 11.1 (25°C) [Ref.]
nitrobenzene: sparingly soluble [Ref.]
nitromethane: 0.0454 (25°C) [Ref.]
propionitrile: 0.039 (25°C) [Ref.]
sulfur dioxide: soluble [Ref.]
water: 124.7 (0°C) [Ref.]
water: 169 (25°C) [Ref.]
water: 219 (60°C) [Ref.]
water: 281 (100°C) [Ref.]

Properties of solutions:

60% (wt.), solvent - water
  Density (g/cm3) = 1.8092 (20°)

Density:

3.55 (20°C, g/cm3)

Vapour pressure (Torr):

0.1 (643°C)
1 (749°C)
10 (887°C)
100 (1073°C)

    Dipole moment (D):

    11.5

    Surface tension (mN/m):

    77.6 (700°C)
    70.2 (800°C)
    63.1 (900°C)
    56.5 (1000°C)

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

    -328.4 (s)

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

    -325.5 (s)

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

    118.03 (s)

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

    52.38 (s)

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

    12.51

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

    150.5

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

    -138.5 (g)

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

    268.76 (g)

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

    37.38 (g)

    LD50 (mg/kg):

    4708 (rats, oral)

    References:

    1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1437-1438
    2. Вредные химические вещества: Неорганические соединения элементов I-IV групп. Справочник. - Л.: Химия, 1988. - pp. 53 [Russian]
    3. Плющев В.Е., Степин Б.Д. Аналитическая химия рубидия и цезия. - М.: Наука, 1975. - pp. 22-27 [Russian]
    4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 93 [Russian]
    5. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 713-714, 738-739 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru