Lutetium

Lutetium
71Lu
- ↑ Lu ↓ Lr Tábìlì ìdásìkò ytterbium ← lutetium → hafnium
Ìhànsójú
silvery white
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà	lutetium, Lu, 71
Ẹ̀ka ẹ́límẹ̀nti	lanthanide Sometimes considered a transition metal
Ẹgbẹ́, àsìkò, àdìpò	n/a, 6, d
Ìwúwo átọ́mù	174.967
Ìtòléra ẹ̀lẹ́ktrónì	[Xe] 6s2 4f14 5d1 2, 8, 18, 32, 9, 2
Physical properties
Phase	solid
Density (near r.t.)	9.841 g·cm−3
Liquid density at m.p.	9.3 g·cm−3
Melting point	1925 K, 1652 °C, 3006 °F
Boiling point	3675 K, 3402 °C, 6156 °F
Heat of fusion	ca. 22 kJ·mol−1
Heat of vaporization	414 kJ·mol−1
Molar heat capacity	26.86 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1906 2103 2346 (2653) (3072) (3663)
Atomic properties
Oxidation states	3 (weakly basic oxide)
Electronegativity	1.27 (Pauling scale)
Ionization energies	1st: 523.5 kJ·mol−1
	2nd: 1340 kJ·mol−1
	3rd: 2022.3 kJ·mol−1
Atomic radius	174 pm
Covalent radius	17±8 pm
Miscellanea
Crystal structure	hexagonal
Magnetic ordering	paramagnetic
Electrical resistivity	(r.t.) (poly) 582 nΩ·m
Thermal conductivity	16.4 W·m−1·K−1
Thermal expansion	(r.t.) (poly) 9.9 µm/(m·K)
Young's modulus	68.6 GPa
Shear modulus	27.2 GPa
Bulk modulus	47.6 GPa
Poisson ratio	0.261
Vickers hardness	1160 MPa
Brinell hardness	893 MPa
CAS registry number	7439-94-3
Àwọn ísótòpù dídúró jùlọ
Main article: Àwọn ísótòpù lutetium
iso NA half-life DM DE (MeV) DP 173Lu syn 1.37 y ε 0.671 173Yb 174Lu syn 3.31 y ε 1.374 174Yb 175Lu 97.41% 175Lu is stable with 104 neutrons 176Lu 2.59% 3.78×1010y β− 1.193 176Hf