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Properties of substance:

malachite

Synonyms:

dicopper(II) carbonate dihydroxide

Group of substances:

inorganic

Physical appearance:

green monoclinic crystals

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

CH2Cu2O5

Structural formula as text:

(CuOH)2CO3

Molar/atomic mass: 221.12

Decomposition temperature (°C):

200

Solubility (g/100 g of solvent):

ethanol: insoluble [Ref.]
water: 0.0001 (20°C) [Ref.]

Density:

4 (20°C, g/cm3)

Dissociation:

pKsp (0) = 33.78 (20°C, water)

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

-1051 (s)

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

-900.9 (s)

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

211.6 (s)

References:

  1. Dean J.A. Lange's handbook of chemistry. - 1999. - pp. 3.27
  2. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 156-157 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 80 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru