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

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

H He

Li Be B C N O F Ne

Na Mg Al Si P S Cl Ar

K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn

Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113

Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu

Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

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

Updated by clh on 2/6/98. This is not a publication of Phoenix College.

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
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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