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|
Neodymium
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Nd | 60 | 144.242 | 1024 °C | 3074 °C | Solid | 7.01 g/cm3 | Metal |
|
|
|
| General |
| Name, Symbol, Number |
neodymium, Nd, 60 |
| Chemical series |
lanthanides |
| Group, Period, Block |
n/a, 6, f |
| Appearance |
silvery white,
yellowish tinge
 |
| Standard atomic weight |
144.242(3) g·mol−1 |
| Electron configuration |
[Xe] 4f4 6s2 |
| Electrons per shell |
2, 8, 18, 22, 8, 2 |
| Physical properties |
| Phase |
solid |
| Density (near r.t.) |
7.01 g·cm−3 |
| Liquid density at m.p. |
6.89 g·cm−3 |
| Melting point |
1297 K
(1024 °C, 1875 °F) |
| Boiling point |
3347 K
(3074 °C, 5565 °F) |
| Heat of fusion |
7.14 kJ·mol−1 |
| Heat of vaporization |
289 kJ·mol−1 |
| Heat capacity |
(25 °C) 27.45 J·mol−1·K−1 |
Vapor pressure
| P(Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T(K) |
1595 |
1774 |
1998 |
(2296) |
(2715) |
(3336) |
|
| Atomic properties |
| Crystal structure |
hexagonal |
| Oxidation states |
3
(mildly basic oxide) |
| Electronegativity |
1.14 (scale Pauling) |
Ionization energies
(more) |
1st: 533.1 kJ·mol−1 |
| 2nd: 1040 kJ·mol−1 |
| 3rd: 2130 kJ·mol−1 |
| Atomic radius |
185 pm |
| Atomic radius (calc.) |
206 pm |
| Miscellaneous |
| Magnetic ordering |
ferromagnetic |
| Electrical resistivity |
(r.t.) (α, poly) 643 nΩ·m |
| Thermal conductivity |
(300 K) 16.5 W·m−1·K−1 |
| Thermal expansion |
(r.t.) (α, poly)
9.6 µm/(m·K) |
| Speed of sound (thin rod) |
(20 °C) 2330 m/s |
| Young's modulus |
(α form) 41.4 GPa |
| Shear modulus |
(α form) 16.3 GPa |
| Bulk modulus |
(α form) 31.8 GPa |
| Poisson ratio |
(α form) 0.281 |
| Vickers hardness |
343 MPa |
| Brinell hardness |
265 MPa |
| CAS registry number |
7440-00-8 |
| Selected isotopes |
|
|
| References |
|
Neodymium Compounds
|
Source: Wikipedia article Neodymium
|
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Chemistry Quick Facts
