|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:abundanceInEarthsCrust
|
3 ppm
|
|
gptkbp:appearance
|
silvery gray metal
|
|
gptkbp:atomicNumber
|
72
|
|
gptkbp:atomicWeight
|
178.49
|
|
gptkbp:block
|
d-block
|
|
gptkbp:boilingPoint
|
4876°C
|
|
gptkbp:BrinellHardness
|
1700 MPa
|
|
gptkbp:CASNumber
|
7440-58-6
|
|
gptkbp:category
|
transition metal
|
|
gptkbp:crystalSystem
|
hexagonal close-packed
|
|
gptkbp:density
|
13.31 g/cm³
|
|
gptkbp:discoveredBy
|
gptkb:George_de_Hevesy
gptkb:Dirk_Coster
|
|
gptkbp:discoveredIn
|
1923
|
|
gptkbp:electricalResistivity
|
33.0 nΩ·m (at 20°C)
|
|
gptkbp:electronConfiguration
|
[Xe] 4f14 5d2 6s2
|
|
gptkbp:electronegativity
|
1.3 (Pauling scale)
|
|
gptkbp:firstIonizationEnergy
|
658.5 kJ/mol
|
|
gptkbp:foundIn
|
gptkb:Denmark
zirconium
|
|
gptkbp:hardnessMohs
|
5.5
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Hafnium
|
|
gptkbp:isotopes
|
Hf-174
Hf-176
Hf-177
Hf-178
Hf-179
Hf-180
|
|
gptkbp:magneticOrdering
|
paramagnetic
|
|
gptkbp:meltingPoint
|
2506°C
|
|
gptkbp:molarHeatCapacity
|
25.73 J/(mol·K)
|
|
gptkbp:namedAfter
|
gptkb:Copenhagen
gptkb:Hafnia
|
|
gptkbp:naturalOccurrence
|
Earth's crust
|
|
gptkbp:oxidationStates
|
+4
|
|
gptkbp:period
|
6
|
|
gptkbp:PoissonsRatio
|
0.37
|
|
gptkbp:relatedGroup
|
4
|
|
gptkbp:secondIonizationEnergy
|
1440 kJ/mol
|
|
gptkbp:stateAtRoomTemperature
|
gptkb:stone
|
|
gptkbp:symbol
|
Hf
|
|
gptkbp:thermalConductivity
|
23 W/(m·K)
|
|
gptkbp:thermalNeutronCaptureCrossSection
|
104 barns
|
|
gptkbp:thirdIonizationEnergy
|
2250 kJ/mol
|
|
gptkbp:toxicity
|
low
|
|
gptkbp:uses
|
semiconductors
alloys
control rods in nuclear reactors
plasma cutting tips
|
|
gptkbp:VickersHardness
|
1700 MPa
|
|
gptkbp:YoungsModulus
|
78 GPa
|
|
gptkbp:bfsParent
|
gptkb:ProxyLogon
|
|
gptkbp:bfsLayer
|
7
|