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Properties of substance:

actinium oxide

Group of substances:

inorganic

Physical appearance:

white hexagonal crystals

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

Ac2O3

Structural formula as text:

Ac2O3

Molar/atomic mass: 502.07

Melting point (°C):

2500

Solubility (g/100 g of solvent):

water: insoluble [Ref.]

Density:

9.19 (20°C, g/cm3)

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

-2047 (s)

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

-1958 (s)

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

134 (s)

References:

  1. Perry D.L. Handbook of Inorganic Compounds. - 2nd ed. - CRC Press, 2011. - pp. 2
  2. Каралова З.К., Мясоедов Б.Ф. Актиний. - М.: Наука, 1982. - pp. 20-21 [Russian]
  3. Лидин Р.А., Андреева Л.Л., Молочко В.А. Константы неорганических веществ. - М.: Дрофа, 2006. - pp. 72, 440 [Russian]
  4. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 16-17 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru