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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/cm3)

Vapour pressure (Torr):

0.01 (1345°C)
0.1 (1535°C)
1 (1776°C)
10 (2090°C)
100 (2530°C)

Electrode potential:

Nd3+ + 3e- → Nd, E = -2.32 V (water, 25°C)
Nd4+ + e- → Nd3+, E = 4.9 V (water, 25°C)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

0 (s)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

0 (s)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

70.92 (s)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

27.4 (s)

References:

  1. Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
  2. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 170-171 [Russian]
  3. 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