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Properties of substance:
indium
Group of substances:
inorganic
Physical appearance:
tetragonal metal
Empirical formula (Hill's system for organic substances):
In
Structural formula as text:
In
Molar/atomic mass: 114.82
Melting point (°C):
156.6
Boiling point (°C):
2109
Solubility (g/100 g of solvent):
mercury
: 133.5 (25°C) [
Ref.
]
water
: insoluble [
Ref.
]
Properties of solutions:
10% (wt.), solvent - mercury
Density (g/cm
3
) = 12.533 (25°)
25% (wt.), solvent - mercury
Density (g/cm
3
) = 11.224 (25°)
50% (wt.), solvent - mercury
Density (g/cm
3
) = 9.4698 (25°)
Numerical data:
Year of discovery: 1863
Superconducting temperature (K): 3.405
Density:
7.362 (20°C, g/cm
3
)
7.023 (157°C, g/cm
3
)
5.763 (2109°C, g/cm
3
)
Vapour pressure (Torr):
0.01 (912°C)
0.1 (1042°C)
1 (1205°C)
10 (1414°C)
100 (1688°C)
Electrode potential:
In
3+
+ e
-
→ In
2+
, E = -0.45 V (water, 25°C)
In
3+
+ 3e
-
→ In, E = -0.338 V (water, 25°C)
In
+
+ e
-
→ In, E = -0.18 V (water, 25°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
0 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
0 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
57.82 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
26.74 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
3.26
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
227.6
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
238 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
173.7 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
20.8 (g)
References:
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 679
Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 215 [Russian]
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 50 [Russian]
Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 59-62 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 64 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 595 [Russian]
Успехи химии. - 1997. - Т.66, №2. - pp. 112 [Russian]
Федоров П.И., Акчурин Р.Х. Индий. - М.: Наука, 2000. - pp. 9-19 [Russian]
Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 226-227 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru