Terbium
65
Tb
Groep
n.v.t.
Periode
6
Blok
f
Protonen
Elektronen
Neutronen
65
65
94
Algemene Eigenschappen
Atoomnummer
65
Atomair gewicht
158,92535
Massa Getal
159
Categorie
Lanthaniden
Kleur
Zilver
Radioactief
Nee
Terbium was named after Ytterby, a town in Sweden
Kristalstructuur
Eenvoudige Hexagonaal
Historie
Terbium was discovered in 1843 by Swedish chemist Carl Gustaf Mosander, who detected it as an impurity in yttria.
Using ammonium hydroxide he precipitated fractions of different basicity from yttria.
In these fractions he found that the fraction that was essentially colorless in solution, but gave a brown-tinged oxide was terbium.
Using ammonium hydroxide he precipitated fractions of different basicity from yttria.
In these fractions he found that the fraction that was essentially colorless in solution, but gave a brown-tinged oxide was terbium.
Eletronen per schil
2, 8, 18, 27, 8, 2
Electronconfiguratie
[Xe] 4f9 6s2
Terbium is soft enough to be cut with a knife
Fysieke Eigenschappen
Fase
Vast
Dichtheid
8,229 g/cm3
Smeltpunt
1629,15 K | 1356 °C | 2472,8 °F
Kookpunt
3503,15 K | 3230 °C | 5846 °F
Fusiewarmte
10,8 kJ/mol
Verdampingswarmte
295 kJ/mol
Specifieke Warmtecapaciteit
0,182 J/g·K
Overvloedig aanwezig in de aardkorst
0,000093%
Overvloedig aanwezig in het universum
5×10-8%
CAS-nummer
7440-27-9
PubChem CID nummer
23958
Atoomeigenschappen
Atoomstraal
177 pm
Covalentiestraal
194 pm
Electronegativiteit
1,2 (Pauling schaal)
Ionisatiepotentiaal
5,8638 eV
Atoomvolume
19,20 cm3/mol
Thermische geleiding
0,111 W/cm·K
Oxidatietoestanden
1, 3, 4
Toepassingen
Terbium is used in alloys and in the production of electronic devices.
It is also used as a dopant for materials in solid-state devices and optical fibers.
Terbium oxide is in fluorescent lamps and TV tubes.
The brilliant fluorescence allows terbium to be used as a probe in biochemistry.
It is also used as a dopant for materials in solid-state devices and optical fibers.
Terbium oxide is in fluorescent lamps and TV tubes.
The brilliant fluorescence allows terbium to be used as a probe in biochemistry.
Terbium is considered to be moderately toxic
Isotopen
Stabiele isotopen
159TbInstabiele isotopen
136Tb, 137Tb, 138Tb, 139Tb, 140Tb, 141Tb, 142Tb, 143Tb, 144Tb, 145Tb, 146Tb, 147Tb, 148Tb, 149Tb, 150Tb, 151Tb, 152Tb, 153Tb, 154Tb, 155Tb, 156Tb, 157Tb, 158Tb, 160Tb, 161Tb, 162Tb, 163Tb, 164Tb, 165Tb, 166Tb, 167Tb, 168Tb, 169Tb, 170Tb, 171Tb