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Properties of substance:
americium
Group of substances:
inorganic
Physical appearance:
metal
Empirical formula (Hill's system for organic substances):
Am
Structural formula as text:
Am
Molar/atomic mass: 243
Melting point (°C):
1173
Boiling point (°C):
2607
Solubility (g/100 g of solvent):
ammonia liquid
: insoluble [
Ref.
]
Numerical data:
Year of discovery: 1944
Density:
13.67 (20°C, g/cm
3
)
Electrode potential:
Am
3+
+ 3e
-
→ Am, E = -2.07 V (water, 25°C)
Am
4+
+ 4e
-
→ Am, E = -0.9 V (water, 25°C)
Am
4+
+ e
-
→ Am
3+
, E = 2.181 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)):
54.84 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
25.85 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
1437
References:
Perry D.L. Handbook of Inorganic Compounds. - 2nd ed. - CRC Press, 2011. - pp. 15
Вредные химические вещества: Радиоактивные вещества. Справочник. - Л., 1990. - pp. 208-209 [Russian]
Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 125-126 [Russian]
Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 32 [Russian]
Химия актиноидов. - Т.2. - М.: Мир, 1997. - pp. 407-422 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru