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Properties of substance:

beryllium fluoride

Group of substances:

inorganic

Physical appearance:

colorless tetragonal crystals

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

BeF2

Structural formula as text:

BeF2

Molar/atomic mass: 47.01

Melting point (°C):

797

Boiling point (°C):

1159

Solubility (g/100 g of solvent):

ethanol abs.: sparingly soluble [Ref.]
hydrogen fluoride : 0.014 (-24.2°C) [Ref.]
hydrogen fluoride : 0.013 (-5.1°C) [Ref.]
hydrogen fluoride : 0.015 (11.2°C) [Ref.]
water: slow soluble 108.4 (25°C) [Ref.]

Properties of solutions:

52% (wt.), solvent - water
  Molarity (moles of solute per liter of solution) = 17.1
  Density (g/cm3) = 1.545 (25°)

Density:

1.99 (25°C, g/cm3)

Vapour pressure (Torr):

1 (775°C)
10 (880°C)
100 (1013°C)

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

-1010 (s)

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

-941 (s)

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

45 (s)

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

59 (s)

LD50 (mg/kg):

98 (rats, oral)
100 (mice, oral)
1.8 (mice, intravenous)
20 (mice, subcutaneous)

References:

  1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-51
  2. Journal of Physical and Colloid Chemistry. - 1948. - Vol. 52, No. 5. - pp. 819-827 [DOI: 10.1021/j150461a007]
  3. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 423
  4. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 104-105 [Russian]
  5. Новоселова А.В., Бацанова Л.Р. Аналитическая химия бериллия. - М.: Наука, 1966. - pp. 23-27 [Russian]
  6. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 56 [Russian]
  7. Редкие и рассеянные элементы. Химия и технология. - Кн. 1. - М.: Мисис, 1996. - pp. 135-137 [Russian]
  8. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 759 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru