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Properties of substance:
neodymium
Group of substances:
inorganic
Physical appearance:
hexagonal metal
Empirical formula (Hill's system for organic substances):
Nd
Structural formula as text:
Nd
Molar/atomic mass: 144.24
Melting point (°C):
1024
Boiling point (°C):
3080
Solubility (g/100 g of solvent):
mercury
: 0.014 (20°C) [
Ref.
]
water
: reaction [
Ref.
]
Numerical data:
Year of discovery: 1885
Density:
7.01 (20°C, g/cm
3
)
Vapour pressure (Torr):
0.01 (1345°C)
0.1 (1535°C)
1 (1776°C)
10 (2090°C)
100 (2530°C)
Electrode potential:
Nd
3+
+ 3e
-
→ Nd, E = -2.32 V (water, 25°C)
Nd
4+
+ e
-
→ Nd
3+
, E = 4.9 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)):
70.92 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
27.4 (s)
References:
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 170-171 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 86 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru