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Physical Properties of 17 Rare Earth Elements

Author : Jordan | Last Updated :

According to the electronic layer structure, physical properties of rare earth elements, symbiosis in minerals and different ionic radius, the 17 rare earth elements are usually divided into two groups:

Light rare earth elements: lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, and gadolinium.

Heavy rare earth elements: terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium.

The following table shows their physical properties
Atomic number Elements Atomic weight Ionic radius (Å) Density (g/cm³) Meltability (℃) Boiling Point (℃) The melting point of the oxide (℃) Specific resistance Ω×10cm6 Ion magnetic moment (μB) Thermal capture cross-section (barn)
57 La 138.9 1.22 6.19 920±5 4230 2315 56.8 0 8.9
58 Ce 140.1 1.18 6.768 804±5 2930 1950 75.3 2.56 0.7
59 Pr 140.9 1.16 6.769 935±5 3020 2500 68 3.62 11.2
60 Nd 144.3 1.15 7.007 1024±5 3180 2270 64.3 3.68 46
61 Pm 147 1.14 － － － － － 2.83 －
62 Sm 150.4 1.13 7.504 1052±5 1630 2350 88 1.55～1.65 5500
63 Eu 152 1.13 5.166 826±10 1490 2050 81.3 3.40～3.50 4600
64 Gd 157.26 1.11 7.868 1350±20 2730 2350 140.5 7.94 46000
65 Tb 158.93 1.09 8.253 1336 2530 2387 － 9.7 44
66 Dy 162.51 1.07 8.565 1485±20 2330 2340 56 10.6 1100
67 Ho 164.94 1.05 8.799 1490 2330 2360 87 10.6 64
68 Er 167.27 1.04 9.058 1500～1550 2630 2355 107 9.6 166
69 Tm 168.94 1.04 9.318 1500～1600 2130 2400 79 7.6 118
70 Yb 173.04 1 6.959 824±5 1530 2346 27 4.5 36
71 Lu 174.99 0.99 9.849 1650～1750 1930 2400 79 0 108
21 Sc 44.97 0.83 2.995 1550～1600 2750 － － － 13
39 Y 88.92 1.06 4.472 1552 3030 2680 － － 1.27
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Author : Jordan Jordan is the writer of the blog with a broad knowledge of this industry. Most importantly, he hopes to help you in your projects sincerely.

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