lanthanum
E600124
Lanthanum is a soft, silvery-white rare-earth metal that serves as the first element of the lanthanide series and is used in applications such as optical glass, catalysts, and battery electrodes.
Statements (54)
| Predicate | Object |
|---|---|
| instanceOf |
chemical element
ⓘ
lanthanide ⓘ rare-earth metal ⓘ |
| appearance |
silvery-white metal
ⓘ
soft metal ⓘ |
| atomicNumber | 57 ⓘ |
| block | f-block ⓘ |
| boilingPoint | 3737 K ⓘ |
| CASNumber | 7439-91-0 ⓘ |
| chemicalSymbol | La ⓘ |
| crystalStructure | hexagonal close-packed ⓘ |
| densityAtRoomTemperature | 6.15 g/cm³ ⓘ |
| discoveredBy | Carl Gustaf Mosander NERFINISHED ⓘ |
| discoveryLocation | Sweden NERFINISHED ⓘ |
| discoveryYear | 1839 ⓘ |
| electronegativityPauling | 1.10 ⓘ |
| electronicConfiguration | [Xe] 5d¹ 6s² ⓘ |
| elementCategory |
lanthanide
ⓘ
rare-earth element ⓘ |
| formsOxide | lanthanum(III) oxide ⓘ |
| isBiologicallyNonessential | true ⓘ |
| isDuctile | true ⓘ |
| isMalleable | true ⓘ |
| isModeratelyToxicInHighDoses | true ⓘ |
| isotopes |
lanthanum-138
ⓘ
lanthanum-139 ⓘ |
| isParamagnetic | true ⓘ |
| isSoft | true ⓘ |
| meltingPoint | 1193 K ⓘ |
| mostAbundantIsotope | lanthanum-139 ⓘ |
| mostCommonOxidationState | +3 ⓘ |
| nameOrigin | Greek word "lanthanein" meaning "to lie hidden" ⓘ |
| naturalIsotopeComposition | mostly stable lanthanum-139 with trace radioactive lanthanum-138 ⓘ |
| occursInMineral |
bastnäsite
ⓘ
monazite ⓘ |
| oxidationState | +3 ⓘ |
| oxideFormula | La2O3 ⓘ |
| positionInPeriodicTable |
group 3 (often assigned)
ⓘ
period 6 ⓘ |
| reactsWithWater | true ⓘ |
| series | lanthanide series ⓘ |
| standardAtomicWeight | 138.90547 ⓘ |
| standardState | solid ⓘ |
| tarnishesInAir | true ⓘ |
| uses |
battery electrodes
ⓘ
camera lenses ⓘ carbon arc lamps ⓘ catalysts ⓘ high-refractive-index glass ⓘ hydrogen storage alloys ⓘ nickel–metal hydride batteries ⓘ optical glass ⓘ petroleum cracking catalysts ⓘ polishing powders ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.