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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):
O
2
Zr
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/cm
3
)
Reactions:
[
Ref.1
]
ZrO
2
+ 2C + 2Br
2
→ ZrBr
4
+ 2CO
Electrode potential:
ZrO
2
+ 4H
+
+ 4e
-
→ Zr + 2H
2
O, E = -1.553 V (water, 25°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-1100.6 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-1042.8 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
50.38 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
56.19 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
87
References:
Блюменталь У.Б. Химия циркония. - М.: ИИЛ, 1963. - pp. 142-160, 219-224 [Russian]
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 648 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 114 [Russian]
Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 387 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru