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Properties of substance:
erbium
Group of substances:
inorganic
Physical appearance:
hexagonal metal
Empirical formula (Hill's system for organic substances):
Er
Structural formula as text:
Er
Molar/atomic mass: 167.26
Melting point (°C):
1525
Boiling point (°C):
2860
Solubility (g/100 g of solvent):
water
: reaction [
Ref.
]
Numerical data:
Year of discovery: 1843
Density:
9.06 (20°C, g/cm
3
)
Electrode potential:
Er
3+
+ 3e
-
→ Er, E = -2.296 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)):
73.2 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
28.12 (s)
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
19.9
ΔH
sublimation
(kJ/mol):
261
References:
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 52 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 114 [Russian]
Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 487-488 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru