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Properties of substance:

zirconium(IV) oxide

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

O2Zr

Structural formula as text:

ZrO2

Molar/atomic mass: 123.22

Melting point (°C):

2700

Boiling point (°C):

4300

Solubility (g/100 g of solvent):

water: insoluble [Ref.]

Density:

5.68 (20°C, g/cm3)

Reactions:

  1. [Ref.1aster]
    ZrO2 + 2C + 2Br2 → ZrBr4 + 2CO

Electrode potential:

ZrO2 + 4H+ + 4e- → Zr + 2H2O, E = -1.553 V (water, 25°C)

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

-1100.6 (s)

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

-1042.8 (s)

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

50.38 (s)

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

56.19 (s)

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

87

References:

  1. Блюменталь У.Б. Химия циркония. - М.: ИИЛ, 1963. - pp. 142-160, 219-224 [Russian]
  2. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 648 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 114 [Russian]
  4. Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 387 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru