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Properties of substance:

rubidium carbonate

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

CO3Rb2

Structural formula as text:

Rb2CO3

Molar/atomic mass: 230.94

Melting point (°C):

835

Decomposition temperature (°C):

835

Solubility (g/100 g of solvent):

ethanol abs.: 0.74 (20°C) [Ref.]
methanol: 24.9 (23.3°C) [Ref.]
water: 234.7 (0°C) [Ref.]
water: 249.3 (25°C) [Ref.]
water: 296.5 (40°C) [Ref.]
water: 301.1 (50°C) [Ref.]

Hygroscopic:

very hygroscopic

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

-1133 (s)

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

-1046 (s)

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

181.3 (s)

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

117.6 (s)

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

29

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1432
  2. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 184-185 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 93 [Russian]
  4. Редкие и рассеянные элементы. Химия и технология. - Кн. 1. - М.: Мисис, 1996. - pp. 77 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 715 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru