|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:allotropes
|
none
|
|
gptkbp:appearance
|
silvery white
|
|
gptkbp:atomicNumber
|
57
|
|
gptkbp:atomicWeight
|
138.90547
|
|
gptkbp:block
|
f-block
|
|
gptkbp:boilingPoint
|
3737 K
|
|
gptkbp:CASNumber
|
7439-91-0
|
|
gptkbp:category
|
rare earth element
|
|
gptkbp:countryProduced
|
gptkb:Australia
gptkb:Brazil
gptkb:China
gptkb:India
|
|
gptkbp:crystalSystem
|
hexagonal
|
|
gptkbp:density
|
6.162 g/cm³
|
|
gptkbp:discoveredBy
|
gptkb:Carl_Gustaf_Mosander
|
|
gptkbp:discoveredIn
|
1839
|
|
gptkbp:ductility
|
ductile
|
|
gptkbp:electricalResistivity
|
615 nΩ·m (at 20°C)
|
|
gptkbp:electronConfiguration
|
[Xe] 5d¹ 6s²
|
|
gptkbp:electronegativity
|
1.10
|
|
gptkbp:firstIonizationEnergy
|
538.1 kJ/mol
|
|
gptkbp:foundIn
|
gptkb:bastnäsite
monazite
|
|
gptkbp:hardness
|
soft
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Lanthanum
|
|
gptkbp:isotopes
|
gptkb:La-138
gptkb:La-139
|
|
gptkbp:IUPACName
|
gptkb:Lanthanum
|
|
gptkbp:magnetType
|
paramagnetic
|
|
gptkbp:mainIsotope
|
gptkb:La-139
|
|
gptkbp:malleability
|
malleable
|
|
gptkbp:meltingPoint
|
1193 K
|
|
gptkbp:namedAfter
|
Greek 'lanthanein' (to lie hidden)
|
|
gptkbp:oxidationStates
|
+3
|
|
gptkbp:period
|
6
|
|
gptkbp:radioactive
|
La-138 is radioactive
|
|
gptkbp:relatedGroup
|
lanthanide
|
|
gptkbp:solubility
|
soluble in acids
|
|
gptkbp:stateAtRoomTemperature
|
gptkb:stone
|
|
gptkbp:symbol
|
gptkb:La
|
|
gptkbp:thermalConductivity
|
13.4 W/(m·K)
|
|
gptkbp:toxicity
|
low toxicity
|
|
gptkbp:type
|
reacts with water
reacts with air
|
|
gptkbp:uses
|
catalysts
battery electrodes
carbon arc lamps
optical glasses
|
|
gptkbp:bfsParent
|
gptkb:Barium_star
gptkb:La
gptkb:Lanthanide
|
|
gptkbp:bfsLayer
|
6
|