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Properties of substance:

zirconium

Group of substances:

inorganic

Physical appearance:

hexagonal metal

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

Zr

Structural formula as text:

Zr

Molar/atomic mass: 91.22

Melting point (°C):

1855

Boiling point (°C):

4320

Solubility (g/100 g of solvent):

lithium molten: 0.079 (700°C) [Ref.]
mercury: 0.0005 (350°C) [Ref.]
sodium fused: 0.0075 (700°C) [Ref.]
water: insoluble [Ref.]

Numerical data:

Year of discovery: 1824
Superconducting temperature (K): 0.53
Superconducting temperature (K): 0.72
Superconducting temperature (K): 1.5

Density:

6.45 (20°C, g/cm3)

Reactions:

  1. [Ref.1]
    Zr + 2F2 → ZrF4
  2. [Ref.1]
    Zr + 2Br2 → ZrBr4

Vapour pressure (Torr):

0.01 (2390°C)
0.1 (2645°C)
1 (2955°C)
10 (3335°C)

Electrode potential:

Zr4+ + 4e- → Zr, E = -1.539 V (water, 25°C)

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

0 (s)

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

0 (s)

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

39 (s)

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

25.36 (s)

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

14.6

Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

557.7

References:

  1. Dean J.A. Lange's handbook of chemistry. - 1999. - pp. 3.60
  2. Блюменталь У.Б. Химия циркония. - М.: ИИЛ, 1963 [Russian]
  3. Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 52 [Russian]
  4. Миллер Г.Л. Цирконий. - М.: ИИЛ, 1955 [Russian]
  5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 113 [Russian]
  6. Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 384-386 [Russian]
  7. Энциклопедия для детей. - Т.17: Химия. - М.: Аванта+, 2004. - pp. 254-256 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru