|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:abundanceInEarthsCrust
|
9.2 ppm
|
|
gptkbp:appearance
|
silvery white
|
|
gptkbp:atomicNumber
|
59
|
|
gptkbp:atomicWeight
|
140.90766
|
|
gptkbp:block
|
f-block
|
|
gptkbp:boilingPoint
|
3793 K
|
|
gptkbp:CASNumber
|
7440-10-0
|
|
gptkbp:category
|
rare earth element
|
|
gptkbp:crystalSystem
|
double hexagonal close-packed
|
|
gptkbp:density
|
6.77 g/cm³
|
|
gptkbp:discoveredBy
|
gptkb:Carl_Auer_von_Welsbach
|
|
gptkbp:discoveredIn
|
1885
|
|
gptkbp:electricalResistivity
|
0.70 μΩ·m (at 20°C)
|
|
gptkbp:electronConfiguration
|
[Xe] 4f3 6s2
|
|
gptkbp:electronegativity
|
1.13 (Pauling scale)
|
|
gptkbp:foundIn
|
gptkb:bastnäsite
monazite
|
|
gptkbp:isotopes
|
gptkb:141Pr
gptkb:142Pr
gptkb:143Pr
gptkb:144Pr
gptkb:145Pr
gptkb:146Pr
gptkb:147Pr
gptkb:148Pr
gptkb:149Pr
gptkb:150Pr
gptkb:154Pr
151Pr
152Pr
153Pr
|
|
gptkbp:magneticOrdering
|
paramagnetic
|
|
gptkbp:mainIsotope
|
gptkb:141Pr
|
|
gptkbp:meltingPoint
|
1208 K
|
|
gptkbp:molarHeatCapacity
|
27.20 J/(mol·K)
|
|
gptkbp:namedAfter
|
Greek words 'prasios didymos' (green twin)
|
|
gptkbp:naturalOccurrence
|
gptkb:stone
|
|
gptkbp:oxidationStates
|
+3
|
|
gptkbp:period
|
6
|
|
gptkbp:radioactive
|
no
|
|
gptkbp:relatedGroup
|
lanthanide
|
|
gptkbp:standardState
|
solid at 298 K
|
|
gptkbp:symbol
|
Pr
|
|
gptkbp:thermalConductivity
|
12.5 W/(m·K)
|
|
gptkbp:toxicity
|
low
|
|
gptkbp:uses
|
aircraft engines
alloys
permanent magnets
carbon arc lighting
coloring glass and ceramics
|
|
gptkbp:bfsParent
|
gptkb:Neodymium
gptkb:Natural_Elements
|
|
gptkbp:bfsLayer
|
7
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
praseodymium
|