Lutetium Element (Periodic Table)

Lutetium

Lutetium (Lu) is a chemical element of the periodic table, located in the group 3 and the period 6, and has the atomic number 71. It is the last element in the lanthanide series. It is a silvery-white metal, whose name comes from “Lutetia”, the ancient Latin name for Paris, in the Roman era. It is counted as one of the rare earth elements.

group
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
period
1
1
H
2
He
2
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
3
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
4
19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
5
37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
6
55
Cs
56
Ba
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
7
87
Fr
88
Ra
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
71
Lu
89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No
103
Lr
– d block

FAQs on Lutetium Element

Lutetium
Lutetium appearance: silvery white
‣ Who discovered lutetium? When was lutetium discovered?

Discovery: Carl Auer von Welsbach and Georges Urbain (1906)
First isolation: Carl Auer von Welsbach (1906)
‣ Where is lutetium located on the periodic table?

Lutetium Periodic Table

Location: Lutetium is found in the sixth row of the periodic table, next to the ytterbium element.
‣ What’s the atomic mass number for lutetium?

Atomic number (Z): 71
Lutetium symbol: Lu
Lutetium atomic weight: 174.9668
‣ What block does lutetium belong to?

Block: d-block
‣ In what group is the element lutetium?

Group: 3
‣ Period of lutetium in the periodic table

Period: 6
Lutetium atomic radius: empirical: 174 pm
Lutetium covalent radius: 187±8 pm
Lutetium melting point: 1925 K (1652 °C, 3006 °F)
Lutetium boiling point: 3675 K (3402 °C, 6156 °F)
Electrons per shell of lutetium: 2, 8, 18, 32, 9, 2
‣ What is the electron configuration of lutetium?

Electron configuration: [Xe] 4f14 5d1 6s2
Lutetium ionization energies:
1st: 523.5 kJ/mol
2nd: 1340 kJ/mol
3rd: 2022.3 kJ/mol
‣ What is the phase of lutetium?

Phase (at r.t): solid
‣ Density of the element lutetium

Density (near r.t): 9.841 g/cm3
when liquid (at m.p): 9.3 g/cm3
Lutetium magnetic ordering: paramagnetic
Lutetium natural occurrence: primordial
Lutetium oxidation state: +3
Electronegativity of lutetium: Pauling scale: 1.27
Lutetium poisson’s ratio: 0.261
Lutetium heat of fusion: ca. 22 kJ/mol
Lutetium heat of vaporization: 414 kJ/mol
Lutetium molar heat capacity: 26.86 J/(mol K)
‣ What is the crystal structure of lutetium?

Crystal structure: hexagonal close-packed (hcp)
Thermal expansion of lutetium: poly: 9.9 µm/(m.K) (at r.t)
Thermal conductivity of lutetium: 16.4 W/(m.K)
Lutetium electrical resistivity: poly: 582 nΩ.m (at r.t)
‣ Lutetium hardness

Vickers hardness: 755-1160 MPa
Brinell hardness: 890-1300 MPa
Young’s modulus of lutetium: 68.6 GPa
Shear modulus of lutetium: 27.2 GPa
Bulk modulus of lutetium: 47.6 GPa
Lutetium CAS number: 7439-94-3

‣ Lutetium vapor pressure

Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)190621032346(2653)(3072)(3663)

‣ How many isotopes of lutetium are there?

Main isotopes of lutetium
IsotopeAbundanceHalf-life (t1/2)Decay modeProduct
173Lusyn1.37 yε173Yb
174Lusyn3.31 yε174Yb
175Lu97.104 %stable
176Lu2.599 %3.78 × 1010 yβ176Hf

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