Statements (53)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
chemical series
|
| gptkbp:abundance |
not especially rare
|
| gptkbp:alsoKnownAs |
gptkb:lanthanoids
|
| gptkbp:atomicNumber |
57-71
|
| gptkbp:characteristic |
rare earth elements
silvery-white metals |
| gptkbp:color |
mostly colorless or pale
|
| gptkbp:containsElement |
gptkb:gadolinium
gptkb:terbium gptkb:praseodymium cerium europium lanthanum neodymium samarium dysprosium erbium holmium lutetium thulium ytterbium promethium |
| gptkbp:discoveredBy |
gptkb:Carl_Gustaf_Mosander
|
| gptkbp:discoveryPeriod |
19th century
|
| gptkbp:firstLine |
lanthanum
|
| https://www.w3.org/2000/01/rdf-schema#label |
lanthanide elements
|
| gptkbp:ionicRadiusTrend |
lanthanide contraction
|
| gptkbp:lastElement |
lutetium
|
| gptkbp:magnetType |
paramagnetic
|
| gptkbp:mineralSource |
gptkb:bastnäsite
monazite |
| gptkbp:oxidationStates |
+3
|
| gptkbp:periodicTableGroup |
f-block
|
| gptkbp:positionInPeriodicTable |
period 6
|
| gptkbp:property |
high melting points
high magnetic susceptibility form trivalent cations |
| gptkbp:radioactive |
promethium
|
| gptkbp:separationDifficulty |
chemically similar
|
| gptkbp:solubility |
form insoluble hydroxides
|
| gptkbp:type |
oxidize in air
react with water |
| gptkbp:usedIn |
optical devices
nuclear reactors lasers petroleum refining catalysts alloys phosphors magnets glass coloring |
| gptkbp:bfsParent |
gptkb:actinide_elements
|
| gptkbp:bfsLayer |
7
|