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Hf - Hafnium (72/178.49)
Material List
(Sr,Hf)O
(3)
Be17Hf2
(2)
Hf
(25)
Hf,Ta,Mo
(1)
Hf,Zr
(5)
HfB2
(4)
HfC
(2)
HfO2
(17)
HfO2,TiO2
(7)
HfO2,Y2O3
(2)
HfV2
(3)
SrHfO3
(1)
Ta,W,Hf
(6)
Ta,W,Hf,X
(5)
ZrO2,HfO2
(3)
15
material,
86
document(s) are retrieved.
Naturally occurring isotopes:
180 178 177 179 176 174
Density:
13.31 (293.15K)
g/cm
3
Melting point:
2227 ± 20
o
C
Boiling point:
4602
o
C
Latent heat of fusion:
122
J/g
Specific heat:
0.144
J/g/K (at room temp.)
Coefficient of lineal thermal expansion:
5.60E-06
cm/cm/K (at room temp.)
Thermal conductivity:
2.30E-01
W/cm/K (at room temp.)
Electrical resistivity:
3.51E-05
hm-cm (at room temp.)
lonization potential (1st):
6.65
eV
Electronic work function Φ:
3.9
Oxidation potentials:
Hf → Hf
4+
+ 4e = 1.70
V
Chemical valence:
4
Electrochemical equivalents:
1.6649
g/amp-hr
lonic radius:
0.71
angstrom
Valence electron potential:
81
-eV
Principal quantum number:
6
Principal electron shells:
K L M N O P
Electronic configuration:
1s2 2s2 2p6 3s2 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d2 6s2
Valence electrons:
5d2 6s2
Crystal form:
HCP
Half life:
Cross section σ:
103 ± 3
barns
Vapor pressure:
1.12E-03
Pa (at melting point)
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