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Properties of substance:

potassium metaborate

Group of substances:

inorganic

Physical appearance:

colorless hexagonal crystals

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

B3K3O6

Structural formula as text:

K3B3O6

Melting point (°C):

940

Solubility (g/100 g of solvent):

diethyl ether: insoluble [Ref.]
ethanol: insoluble [Ref.]
water: 71 (30°C) [Ref.]

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

-982 (s)

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

80 (s)

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

67 (s)

References:

  1. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 126-127 [Russian]
  2. Справочник экспериментальных данных по растворимости солевых систем. - Т. 3. - Л.: ГНТИХЛ, 1961. - pp. 1788-1789 [Russian]
  3. Уэллс А. Структурная неорганическая химия. - Т. 3. - М.: Мир, 1987. - pp. 193-194 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru