Tm - Thulium

Thulium was discovered in erbium ore in 1879 by Per Cleve in Sweden.

Atomic number - 69 Density g/mL 9 .33

Atomic weight u 168 .9342 Melting point K 1818

Bonding radius A 1 .56 Boiling point K 2220

Atomic radius A 2 .42 Heat of vaporization kJ/mol 191

Ionization Potential V 6 .184 Heat of fusion kJ/mol 16 .84

Electronegativity - 1 .25 Specific heat J/gK 0 .16

The oxide is a weak base.
Crystal are hexagonal.

Electron config. : [Xe] 4f¹³ 6s²

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

146
62 msec
p,1.128 MeV
Er-145
145.96693 147
0.559 sec
EC/p,10.700
Er-147/Er-146
146.96092 147a
0.39 msec
p,1.061 MeV
Er-146
146.96092 148
0.7 sec
EC,12.000 MeV
Er-148
147.95727 149
0.9 sec
EC/ECp,9.600
Er-149/Ho-148
148.95233 150
2.2 sec
EC,11.100 MeV
Er-150
149.94965 151
4.17 sec
EC,7.400 MeV
Er-151
150.94543

152
8.0 sec
EC,8.600 MeV
Er-152
151.94428 153
1.48 sec
a/EC,5.248
Ho-149/Er-153
152.94202 154
8.1 sec
a/EC,8.050
Ho-150/Er-154
153.94142 155
21.6 sec
a/EC,5.580
Ho-151/Er-155
154.93919 156
83.8 sec
a/EC,7.200
Ho-152/Er-156
155.93892 157
3.63 min
EC,4.480 MeV
Er-157
156.93675 158
3.98 min
EC,6.600 MeV
Er-158
157.93699

159
9.13 min
EC,3.850 MeV
Er-159
158.93481 160
9.4 min
EC,5.600 MeV
Er-160
159.93505 161
30.2 min
EC,3.160 MeV
Er-161
160.93339 162
21.70 min
EC,4.810 MeV
Er-162
161.93393 163
1.810 hr
EC,2.439 MeV
Er-163
162.93264 164
2.0 min
EC,3.962 MeV
Er-164
163.93345 165
30.06 hr
EC,1.592 MeV
Er-165
164.93243

166
7.70 hr
EC,3.040 MeV
Er-166
165.93355 167
9.25 da
EC,1.007 MeV
Er-167
166.93284 168
93.1 da
B-/EC,1.679
Yb-168/Er-168
167.93417 169 100%

Stable

168.93421 170
128.6 da
B-/EC,3.990
Yb-170/Er-170
169.93579 171
1.92 yr
B-,1.490 MeV
Yb-171
170.93642 172
63.6 hr
B-,1.880 MeV
Yb-172
171.93839

173
8.24 hr
B-,1.298 MeV
Yb-173
172.93960 174
5.4 min
B-,3.080 MeV
Yb-174
173.94216 175
15.2 min
B-,2.390 MeV
Yb-175
174.94383 176
1.9 min
B-,3.880 MeV
Yb-176
175.94673 177
85 sec
B-,3.200 MeV
Yb-177
176.94868 MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass

Atomic number	-	69		Density	g/mL	9	.33
Atomic weight	u	168	.9342	Melting point	K	1818
Bonding radius	A	1	.56	Boiling point	K	2220
Atomic radius	A	2	.42	Heat of vaporization	kJ/mol	191
Ionization Potential	V	6	.184	Heat of fusion	kJ/mol	16	.84
Electronegativity	-	1	.25	Specific heat	J/gK	0	.16
The oxide is a weak base.				Crystal are hexagonal.
Electron config. : [Xe] 4f¹³ 6s²

146 62 msec p,1.128 MeV Er-145 145.96693	147 0.559 sec EC/p,10.700 Er-147/Er-146 146.96092	147a 0.39 msec p,1.061 MeV Er-146 146.96092	148 0.7 sec EC,12.000 MeV Er-148 147.95727	149 0.9 sec EC/ECp,9.600 Er-149/Ho-148 148.95233	150 2.2 sec EC,11.100 MeV Er-150 149.94965	151 4.17 sec EC,7.400 MeV Er-151 150.94543
152 8.0 sec EC,8.600 MeV Er-152 151.94428	153 1.48 sec a/EC,5.248 Ho-149/Er-153 152.94202	154 8.1 sec a/EC,8.050 Ho-150/Er-154 153.94142	155 21.6 sec a/EC,5.580 Ho-151/Er-155 154.93919	156 83.8 sec a/EC,7.200 Ho-152/Er-156 155.93892	157 3.63 min EC,4.480 MeV Er-157 156.93675	158 3.98 min EC,6.600 MeV Er-158 157.93699
159 9.13 min EC,3.850 MeV Er-159 158.93481	160 9.4 min EC,5.600 MeV Er-160 159.93505	161 30.2 min EC,3.160 MeV Er-161 160.93339	162 21.70 min EC,4.810 MeV Er-162 161.93393	163 1.810 hr EC,2.439 MeV Er-163 162.93264	164 2.0 min EC,3.962 MeV Er-164 163.93345	165 30.06 hr EC,1.592 MeV Er-165 164.93243
166 7.70 hr EC,3.040 MeV Er-166 165.93355	167 9.25 da EC,1.007 MeV Er-167 166.93284	168 93.1 da B-/EC,1.679 Yb-168/Er-168 167.93417	169 100% Stable 168.93421	170 128.6 da B-/EC,3.990 Yb-170/Er-170 169.93579	171 1.92 yr B-,1.490 MeV Yb-171 170.93642	172 63.6 hr B-,1.880 MeV Yb-172 171.93839
173 8.24 hr B-,1.298 MeV Yb-173 172.93960	174 5.4 min B-,3.080 MeV Yb-174 173.94216	175 15.2 min B-,2.390 MeV Yb-175 174.94383	176 1.9 min B-,3.880 MeV Yb-176 175.94673	177 85 sec B-,3.200 MeV Yb-177 176.94868	MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass