Isotopes of hafnium

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Hafnium (Hf)
Standard atomic mass: 178.49(2) u

Table

Z(p)	N(n)	isotopic mass (u)	nuclide symbol	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
72	81	152.97069(54)#	Hf-153
72	82	153.96486(54)#	Hf-154
72	83	154.96339(43)#	Hf-155
72	84	155.95936(22)	Hf-156
72	85	156.95840(21)#	Hf-157
72	86	157.954799(19)	Hf-158
72	87	158.953995(18)	Hf-159
72	88	159.950684(12)	Hf-160
72	89	160.950275(24)	Hf-161
72	90	161.94721(1)	Hf-162
72	91	162.94709(3)	Hf-163
72	92	163.944367(22)	Hf-164
72	93	164.94457(3)	Hf-165
72	94	165.94218(3)	Hf-166
72	95	166.94260(3)	Hf-167
72	96	167.94057(3)	Hf-168
72	97	168.94126(3)	Hf-169
72	98	169.93961(3)	Hf-170
72	99	170.94049(3)	Hf-171
72	100	171.939448(26)	Hf-172
72	101	172.94051(3)	Hf-173
72	102	173.940046(3)	Hf-174	0.0016(1)	0.001619-0.001621
72	103	174.941509(3)	Hf-175
72	104	175.9414086(24)	Hf-176	0.0526(7)	0.05206-0.05271
72	105	176.9432207(23)	Hf-177	0.1860(9)	0.18593-0.18606
72	106	177.9436988(23)	Hf-178	0.2728(7)	0.27278-0.27297
72	107	178.9458161(23)	Hf-179	0.1362(2)	0.13619-0.1363
72	108	179.9465500(23)	Hf-180	0.3508(16)	0.35076-0.351
72	109	180.9491012(23)	Hf-181
72	110	181.950554(7)	Hf-182
72	111	182.95353(3)	Hf-183
72	112	183.95545(4)	Hf-184
72	113	184.95882(21)#	Hf-185
72	114	185.96089(32)#	Hf-186
72	115	186.96459(43)#	Hf-187
72	116	187.96685(54)#	Hf-188

Notes

• Evaluated isotopic composition is for most but not all commercial samples.
• Values marked # are not purely derived from experimental data, but at least partly from systematic trends.
• Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values from Ame2003 denote one standard deviation. Values from IUPAC are expanded uncertainties.

References

• Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
• Isotopic compositions and standard atomic masses from Atomic Weights of the Elements: Review 2000 (IUPAC Technical Report). Pure Appl. Chem., Vol. 75, No. 6, pp. 683-800, (2003).

Isotopes of lutetium

Isotopes of hafnium

Isotopes of tantalum

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