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Properties of substance:

potassium disilicate

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

K2O5Si2

Structural formula as text:

K2Si2O5

Molar/atomic mass: 214.37

Melting point (°C):

1045

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

-2510 (s)

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

190.6 (s)

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

160.7 (s)

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

35.2

References:

  1. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 130-131 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru