Main page (Russian)
Search in database (English)
Properties of substance:
osmium(VIII) oxide
Synonyms:
osmium tetraoxide
Group of substances:
inorganic
Physical appearance:
monoclinic crystals
Empirical formula (Hill's system for organic substances):
O
4
Os
Structural formula as text:
OsO4
Molar/atomic mass: 254.228
Melting point (°C):
41
Boiling point (°C):
131
CAS №: 20816-12-0
Solubility (g/100 g of solvent):
benzene
: soluble [
Ref.
]
carbon tetrachloride
: 375 (25°C) [
Ref.
]
diethyl ether
: soluble [
Ref.
]
ethanol
: soluble [
Ref.
]
water
: 5.26 (0°C) [
Ref.
]
water
: 5.75 (10°C) [
Ref.
]
water
: 6.44 (20°C) [
Ref.
]
water
: 7.01 (25°C) [
Ref.
]
Density:
4.906 (22°C, g/cm
3
)
Vapour pressure (Torr):
1 (2.9°C)
10 (31.3°C)
100 (75.1°C)
Electrode potential:
OsO
4
+ 8H
+
+ 8e
-
→ Os + 4H
2
O, E = 0.85 V (water, 25°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-394 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-302.5 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
164 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
14.3
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
37.2
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-336 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
293.6 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
74 (g)
Critical temperature (°C):
405
References:
CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-79
Dean J.A. Lange's handbook of chemistry. - 1999. - pp. 3.41
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1361-1362
Гинзбург С.И., Езерская Н.А., Прокофьева И.В., Федоренко Н.В., Шленская В.И., Бельский Н.К. Аналитическая химия платиновых металлов. - М.: Наука, 1972. - pp. 93-94 [Russian]
Гринвуд Н., Эрншо А. Химия элементов. - Т.2. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 410 [Russian]
Левингстон С. Химия рутения, родия, палладия, осмия, иридия, платины. - М.: Мир, 1978. - pp. 95-96 [Russian]
Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 380, 412-413 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 89 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 360 [Russian]
Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1013 [Russian]
What information do you need?
© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru