Dy - Dysprosium

The rare earth metal dysprosium was discovered by de Boisbaudrain in 1886. Dysprosium is a component of glass blowers specticles.

Atomic number - 66 Density g/mL 8 .54
Atomic weight u 162 .5 Melting point K 1682
Bonding radius A 1 .59 Boiling point K 2835
Atomic radius A 2 .49 Heat of vaporization kJ/mol 230
Ionization Potential V 5 .94 Heat of fusion kJ/mol 11 .06
Electronegativity - 1 .22 Specific heat J/gK 0 .17
The oxide is weak base.
Crystal are hexagonal.

Electron config. : [Xe] 4f10 6s2


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


141
0.9 sec
EC/ECp,9.300
Tb-141/Gd-140
140.95115
142
2.3 sec
EC/ECp,6.900
Tb-142/Gd-141
141.94610
143
3.9 sec
EC/ECp,8.800
Tb-143/Gd-142
142.94396
144
9.1 sec
EC/ECp,6.200
Tb-144/Gd-143
143.93902
145
10.5 sec
EC,7.720 MeV
Tb-145
144.93696
146
33.2 sec
EC,5.160 MeV
Tb-146
145.93251
147
40 sec
EC/ECp,6.370
Tb-147/Gd-146
146.93088
148
3.1 min
EC,2.678 MeV
Tb-148
147.92709
149
4.20 min
EC,3.812 MeV
Tb-149
148.92733
150
7.17 min
a/EC,1.794
Gd-146/Tb-150
149.92557
151
17.9 min
a/EC,2.870
Gd-147/Tb-151
150.92617
152
2.38 hr
a/EC,4.492
Gd-148/Tb-152
151.92471
153
6.4 hr
a/EC,2.170
Gd-149/Tb-153
152.92576
154
3.0E+6 yr
a,2.947 MeV
Gd-150
153.92442
155
9.9 hr
EC,2.095 MeV
Tb-155
154.92574
156 0.06%

Stable

155.92427
157
8.14 hr
EC,1.341 MeV
Tb-157
156.92546
158 0.10%

Stable

157.92440
159
144.4 da
EC,2.514 MeV
Tb-159
158.92573
160 2.34%

Stable

159.92519
161 18.9%

Stable

160.92692
162 25.5%

Stable

161.92679
163 24.9%

Stable

162.92872
164 28.2%

Stable

163.92917
165
2.334 hr
B-,1.286 MeV
Ho-165
164.93170
166
81.6 hr
B-,3.920 MeV
Ho-166
165.93280
167
6.20 min
B-,2.350 MeV
Ho-167
166.93565
168
8.7 min
B-,1.600 MeV
Ho-168
167.93719
169
39 sec
B-,3.200 MeV
Ho-169
168.94031
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass