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Properties of substance:
lutetium
Group of substances:
inorganic
Physical appearance:
hexagonal metal
Empirical formula (Hill's system for organic substances):
Lu
Structural formula as text:
Lu
Molar/atomic mass: 174.967
Melting point (°C):
1660
Boiling point (°C):
3410
Numerical data:
Year of discovery: 1907
Superconducting temperature (K): 0.1
Density:
9.849 (20°C, g/cm
3
)
Vapour pressure (Torr):
0.01 (451°C)
0.1 (1287°C)
1 (1453°C)
10 (1649°C)
100 (1938°C)
Electrode potential:
Lu
3+
+ 3e
-
→ Lu, E = -2.255 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)):
49.4 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
27 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
18.8
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
322
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
428 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
184.7 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
20.9 (g)
References:
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 77 [Russian]
Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 619 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru