|
gptkbp:instanceOf
|
chemical element
|
|
gptkbp:area
|
4
|
|
gptkbp:challenges
|
2.5
|
|
gptkbp:chemicalFormula
|
+3
body-centered cubic
+4
|
|
gptkbp:climate
|
13.31 g/cm³
|
|
gptkbp:colors
|
silvery-gray
|
|
gptkbp:distribution
|
13.31 g/cm³
|
|
gptkbp:engine
|
d-block
|
|
gptkbp:engineConfiguration
|
[Xe] 4f14 5d2
|
|
gptkbp:environmentalImpact
|
23.4 W/(m·K)
|
|
gptkbp:environmentalProtection
|
none known
|
|
gptkbp:established
|
gptkb:D._M._L._de_Boer
Zirconium
|
|
gptkbp:expansion
|
6.5 × 10⁻⁶ K⁻¹
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
hafnium
|
|
gptkbp:iceClass
|
2233 K
4603 K
|
|
gptkbp:internationalClassification
|
reacts with halogens
reacts with acids
reacts with oxygen
reacts with nitrogen
|
|
gptkbp:is_located_in
|
gptkb:Copenhagen
|
|
gptkbp:isATypeOf
|
7440-58-6
|
|
gptkbp:ISO639-3
|
gptkb:Hf-180
gptkb:Hf-178
Hf-174
Hf-176
|
|
gptkbp:material
|
Hf-Ta_alloys
Hf-W_alloys
Hf-Zr_alloys
|
|
gptkbp:notableFeature
|
1.3
|
|
gptkbp:numberOfFigures
|
72
|
|
gptkbp:occursAnnually
|
Zirconium minerals
primordial
|
|
gptkbp:period
|
6
|
|
gptkbp:previousName
|
gptkb:Hafnia
|
|
gptkbp:related_to
|
gptkb:Tantalum
Titanium
Zirconium
Rutherfordium
hafnium bromide
hafnium carbide
hafnium chloride
hafnium hydride
hafnium iodide
hafnium nitride
hafnium oxide
hafnium sulfide
|
|
gptkbp:releaseYear
|
1923
|
|
gptkbp:symbol
|
Hf
|
|
gptkbp:uses
|
semiconductors
nuclear reactors
tungsten_alloys
|