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Properties of substance:

thallium(I) oxide

Group of substances:

inorganic

Physical appearance:

black hexagonal crystals

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

OTl2

Structural formula as text:

Tl2O

Molar/atomic mass: 424.74

Melting point (°C):

303

Boiling point (°C):

493

Solubility (g/100 g of solvent):

ethanol: soluble [Ref.]
water: reaction [Ref.]

Hygroscopic:

yes

Density:

9.52 (16°C, g/cm3)

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

-167.4 (s)

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

-153.1 (s)

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

161.1 (s)

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

30.3

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

9 (g)

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

314 (g)

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

51 (g)

References:

  1. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 70 [Russian]
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 102 [Russian]
  3. Спиридонова В.С., Шабалина Л.П. Токсикология таллия и его соединений, вопросы гигиены труда при работе с ним. - М., 1977. - pp. 5 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru