|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:appearance
|
silvery-white
|
|
gptkbp:atomicNumber
|
77
|
|
gptkbp:atomicWeight
|
192.217
|
|
gptkbp:block
|
d-block
|
|
gptkbp:boilingPoint
|
4428°C
|
|
gptkbp:CASNumber
|
7439-88-5
|
|
gptkbp:category
|
gptkb:transition_metals
chemical elements
platinum group metals
|
|
gptkbp:corrosionResistance
|
very high
|
|
gptkbp:crystalSystem
|
face-centered cubic
|
|
gptkbp:density
|
22.56 g/cm³
|
|
gptkbp:discoveredBy
|
gptkb:Smithson_Tennant
|
|
gptkbp:discoveredIn
|
1803
|
|
gptkbp:electricalResistivity
|
4.7 nΩ·m
|
|
gptkbp:electronegativity
|
2.20
|
|
gptkbp:foundIn
|
Earth's crust
|
|
gptkbp:hardnessMohs
|
6.5
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Iridium
|
|
gptkbp:isotopes
|
gptkb:Ir-191
gptkb:Ir-193
|
|
gptkbp:mainProducer
|
gptkb:Canada
gptkb:Russia
gptkb:South_Africa
gptkb:United_States
|
|
gptkbp:meltingPoint
|
2466°C
|
|
gptkbp:mostStableIsotope
|
gptkb:Ir-193
|
|
gptkbp:namedAfter
|
gptkb:Iris_(Greek_goddess)
|
|
gptkbp:oxidationStates
|
+1
+2
+3
+8
+6
+4
|
|
gptkbp:period
|
6
|
|
gptkbp:rarity
|
very rare
|
|
gptkbp:relatedEvent
|
gptkb:Cretaceous–Paleogene_extinction_event
|
|
gptkbp:relatedGroup
|
9
|
|
gptkbp:series
|
transition metal
|
|
gptkbp:symbol
|
gptkb:Ir
|
|
gptkbp:thermalConductivity
|
147 W/(m·K)
|
|
gptkbp:toxicity
|
low
|
|
gptkbp:uses
|
spark plugs
electrical contacts
alloys with platinum
crucibles
pen tips
|
|
gptkbp:bfsParent
|
gptkb:Low_Earth_Orbit
gptkb:Starlink_constellation
|
|
gptkbp:bfsLayer
|
5
|