|
|
| Ìfarahàn |
silvery white
 |
| Àwọn ìní àníkárí |
| Orúkọ, àmì-ìdámọ̀, nọ́mbà |
neodymium, Nd, 60 |
| Ẹ̀ka apilẹ̀sẹ̀ |
lanthanide |
| Àdìpọ̀, ìgbà, block |
n/a, 6, f |
| Ìwúwo átọ́mù |
144.242 g·mol−1 |
| Ìtòjọ ẹ̀lẹ́ktrónì |
[Xe] 4f4 6s2 |
| Àwọn ẹ̀lẹ́ktrónì lórí ọ̀nà kan |
2, 8, 18, 22, 8, 2 (Image) |
| Àwọn ìní aláfójúrí |
| Phase |
solid |
| Kíki (tó súnmọ́ r.t.) |
7.01 g·cm−3 |
| Liquid density at m.p. |
6.89 g·cm−3 |
| ojúàmì ìyọ́ |
1297 K, 1024 °C, 1875 °F |
| ajúàmì ìhó |
3347 K, 3074 °C, 5565 °F |
| Heat of fusion |
7.14 kJ·mol−1 |
| Heat of vaporization |
289 kJ·mol−1 |
| Specific 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 |
| Oxidation states |
3, 2 (mildly basic oxide) |
| Electronegativity |
1.14 (Pauling scale) |
| Ionization energies |
1st: 533.1 kJ·mol−1 |
| 2nd: 1040 kJ·mol−1 |
| 3rd: 2130 kJ·mol−1 |
| Atomic radius |
181 pm |
| Covalent radius |
201±6 pm |
| Miscellanea |
| Crystal structure |
hexagonal |
| Magnetic ordering |
paramagnetic, antiferromagnetic below 20K [1] |
| 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 |
| Most stable isotopes |
| Main article: Isotopes of neodymium |
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Neodymium (pípè /ˌniː.ɵˈdɪmiəm/ NEE-o-DIM-ee-əm) je apilese kemika to ni ami-idamo Nd ati nomba atomu 60.
- ↑ Gschneidner, K.A., and Eyring, L., Handbook on the Physics and Chemistry of Rare Earths, North Holland Publishing Co., Amsterdam, 1978.
