Main page (Russian) Search in database (English)

Properties of substance:

cryolite

Synonyms:

sodium hexafluoroaluminate

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

AlF6Na3

Structural formula as text:

Na3AlF6

Molar/atomic mass: 209.941

Melting point (°C):

1009

Decomposition temperature (°C):

1200

Solubility (g/100 g of solvent):

water: 0.03481 (0°C) [Ref.]
water: 0.039 (20°C) [Ref.]
water: 0.04177 (25°C) [Ref.]
water: 0.13518 (100°C) [Ref.]

Numerical data:

Hardness on the Mohs’ scale: 2.5

Density:

2.9 (20°C, g/cm3)
2.62 (1012°C, g/cm3)
2.087 (1012°C, g/cm3)

Dissociation:

pKsp (0) = 9.4 (20°C, water)

Viscosity (mPa·s):

6.7 (1012°C)

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

-3312 (s)

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

238 (s)

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

215.9 (s)

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

113

References:

  1. Kirk-Othmer Encyclopedia of chemical technology. - 4ed., Vol. 11. - pp. 142-145
  2. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 168-169 [Russian]
  3. Лидин Р.А., Андреева Л.Л., Молочко В.А. Константы неорганических веществ. - М.: Дрофа, 2006. - pp. 75 [Russian]
  4. Химическая технология неорганических веществ. - Кн.1, под ред. Ахметова Т.Г. - М.: Высшая школа, 2002. - pp. 304 [Russian]
  5. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 361 [Russian]

    What information do you need?




    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru