Lu - Lutetium

A rare earth metal discovered in 1907 by Urbain in France and James at the University of New HAmpshire. 

Atomic number - 71 Density g/mL 9 .84
Atomic weight u 174 .967 Melting point K 1936
Bonding radius A 1 .56 Boiling point K 3668
Atomic radius A 2 .25 Heat of vaporization kJ/mol 355 .9
Ionization Potential V 5 .43 Heat of fusion kJ/mol 18 .6
Electronegativity - 1 .27 Specific heat J/gK 0 .15
The oxide is a weak base.
Crystal are hexagonal.

Electron config. : [Xe] 4f14 5d1 6s2


Isotopes of Lu: Click mass number for decay process, product for element page.

 
150
35 msec
p,1.270 MeV
Yb-149
149.97262
151
88 msec
p,1.240 MeV
Yb-150
150.96714
152
0.7 sec
EC/ECp,12.500
Yb-152/Tm-151
151.96360
153

p,6.700 MeV
Yb-152
152.95866
154
1.12 sec
EC,10.100 MeV
Yb-154
153.95705
155
140 msec
a/EC,5.337
Tm-151/Yb-155
154.95415
156
0.73 sec
a/EC,5.590
Tm-152/Yb-156
155.95287
157
6.8 sec
a/EC,5.096
Tm-153/Yb-157
156.95010
158
10.6 sec
a/EC,8.670
Tm-154/Yb-158
157.94916
159
12.1 sec
a/EC,5.990
Tm-155/Yb-159
158.94666
160
36.1 sec
a/EC,7.880
Tm-156/Yb-160
159.94602
161
72 sec
EC,5.300 MeV
Yb-161
160.94354
162
1.37 min
EC,7.220 MeV
Yb-162
161.94349
163
238 sec
EC,4.600 MeV
Yb-163
162.94120
164
3.14 min
EC,6.250 MeV
Yb-164
163.94123
165
10.74 min
EC,3.920 MeV
Yb-165
164.93960
166
2.65 min
EC,5.480 MeV
Yb-166
165.93976
167
51.5 min
EC,3.130 MeV
Yb-167
166.93830
168
5.5 min
EC,4.480 MeV
Yb-168
167.93870
169
34.06 hr
EC,2.293 MeV
Yb-169
168.93764
170
2.012 da
EC,3.459 MeV
Yb-170
169.93847
171
8.24 da
EC,1.479 MeV
Yb-171
170.93791
172
6.70 da
EC,2.519 MeV
Yb-172
171.93908
173
1.37 yr
EC,1.298 MeV
Yb-173
172.93892
174
3.31 yr
EC,1.374 MeV
Yb-174
173.94033
174a
142 da
EC,1.545 MeV
Yb-174
173.94051
175 97.41%

Stable

174.94076
176 2.59%
3.78E10 yr
B-/EC,1.193
Hf-176/Yb-176
175.94268
177
6.734 da
B-,1.399 MeV
Hf-177
176.94375
178
28.4 min
B-,2.099 MeV
Hf-178
177.94595
179
4.59 hr
B-,1.405 MeV
Hf-179
178.94732
180
5.7 min
B-,3.100 MeV
Hf-180
179.94987
181
3.5 min
B-,2.500 MeV
Hf-181
180.95179
182
2.0 min
B-,2.500 MeV
Hf-182
181.95533
183
58 sec
B-,2.500 MeV
Hf-183
182.95732
184
20 sec
B-,2.500 MeV
Hf-184
183.96125
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass