Terbium
65
Tb
Gruppe
i/t
Periode
6
Blokk
f
Proton
Elektron
Nøytron
65
65
94
Generelle eigenskapar
Atomnummer
65
Atommasse
158,92535
Massetal
159
Kategori
Lantanid
Farge
Sølv
Radioaktiv
Nei
Terbium was named after Ytterby, a town in Sweden
Krystallstruktur
Enkel heksagonal
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.
Elektron per energinivå
2, 8, 18, 27, 8, 2
Elektronkonfigurasjon
[Xe] 4f9 6s2
Terbium is soft enough to be cut with a knife
Fysiske eigenskapar
Tilstandsform
Fast stoff
Tettleik
8,229 g/cm3
Smeltepunkt
1629,15 K | 1356 °C | 2472,8 °F
Kokepunkt
3503,15 K | 3230 °C | 5846 °F
Smeltevarme
10,8 kJ/mol
Fordampingsvarme
295 kJ/mol
Spesifikk varmekapasitet
0,182 J/g·K
Førekomst i jordskorpa
0,000093%
Førekomst i universet
5×10-8%
CAS-nummer
7440-27-9
PubChem CID-nummer
23958
Atom eigenskapar
Atomradius
177 pm
Kovalent radius
194 pm
Elektronegativitet
1,2 (Paulings skala)
Ioniseringspotensial
5,8638 eV
Molart volum
19,20 cm3/mol
Termisk konduktivitet
0,111 W/cm·K
Oksidasjonstrinn
1, 3, 4
Bruksområde
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
Isotopar
Stabile isotopar
159TbUstabile isotopar
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