Hafnium

Symbol HfAtomic number 72
Atomic mass
178.49
 Thermal conductivity
0.330
Atomic radius
2.16
 Covalent radius
1.44
Density
13.1
 Atomic volume
13.6
Melting point
2500
 Oxidation states
4
Boiling point
4876
 Stable isotopes
6
Heat of vapor.
575
 Electronegativity
1.3
Heat of fusion
24.06
 First ionization
6.65
Specific heat
0.14
 Electrical conduct.
...
Electron configuration

General descriptionNuclear data
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Hafnium

Hafnium is a transition metal similar to zirconium. Natural zirconium minerals usually contain a few percent of hafnium. Lithium and sodium are found with either zirconium, titanium or hafnium in the mineral zektzerite

Hafnium was discovered in 1923, but has found little application.

Atomic dataNuclear data
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Periodic Table

Chemistry concepts

Reference
Pauling
 
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Hafnium Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2)
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
72
174
173.940044
161.9886
1404.0
0
0.00162
2x1015y
a
2.50
72
176
175.941405
163.8529
1418.8
0
0.05206
stable
...
...
72
177
176.943217
164.7861
1425.2
7/2
0.18606
stable
...
...
72
178
177.943696
165.7180
1432.8
0
0.27297
stable
...
...
72
179
178.945812
166.6515
1438.9
9/2
0.13629
stable
...
...
72
180
179.946546
167.5837
1446.3
0
0.351
stable
...
...
72
182
181.950550
169.4504
1458.7
0
...
9My
b-
0.37
Atomic data
Index

Periodic Table

Chemistry concepts

Reference
Rohlf
 
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