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Properties of substance:

cesium sulfate

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

Cs2O4S

Structural formula as text:

Cs2SO4

Molar/atomic mass: 361.87

Melting point (°C):

1010

Solubility (g/100 g of solvent):

1-propanol: 0.0002 (25°C) [Ref.]
acetone: insoluble [Ref.]
ethanol: 0.0005 (25°C) [Ref.]
ethylene glycol : soluble [Ref.]
methanol: 0.01338 (25°C) [Ref.]
sulfuric acid: sparingly soluble [Ref.]
water: 167.1 (0°C) [Ref.]
water: 178.7 (20°C) [Ref.]
water: 181.7 (25°C) [Ref.]
water: 184.1 (30°C) [Ref.]
water: 189.9 (40°C) [Ref.]
water: 199.9 (60°C) [Ref.]
water: 210.3 (80°C) [Ref.]
water: 220.3 (100°C) [Ref.]

Properties of solutions:

64,5% (wt.), solvent - water
  Density (g/cm3) = 2.013 (25°)

Density:

4.24 (20°C, g/cm3)

Reactions:

  1. [Ref.1]
    Cs2SO4 + F2 → CsSO4F + CsF
  2. [Ref.1]
    Cs2SO4 + Ba(OH)2 → 2CsOH + BaSO4

Surface tension (mN/m):

110 (1040°C)
106 (1100°C)
99 (1200°C)
85 (1500°C)

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

-1642.6 (s)

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

-1300 (s)

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

205.9 (s)

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

-1104 (g)

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

410 (g)

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

110 (g)

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

36

LD50 (mg/kg):

2800 (white mice, oral)

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 464
  2. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 328 [Russian]
  3. Плющев В.Е., Степин Б.Д. Химия и технология соединений лития, рубидия и цезия. - М.: Химия, 1970. - pp. 114-116 [Russian]
  4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 112 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 207 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru