Terbium
65
Tb
Gruppe
n/a
Periode
6
Blok
f
Protoner
Elektroner
Neutroner
65
65
94
Generelle Egenskaber
Atomnummer
65
Atommasse
158,92535
Masseantal
159
Kategori
Lantanider
Farve
Sølv
Radioaktiv
Nej
Terbium was named after Ytterby, a town in Sweden
Krystalstruktur
Simpel Hexagonal
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.
Elektroner i hver skal
2, 8, 18, 27, 8, 2
Elektronkonfiguration
[Xe] 4f9 6s2
Terbium is soft enough to be cut with a knife
Fysiske Egenskaber
Tilstandsform
Fast stof
Massefylde
8,229 g/cm3
Smeltepunkt
1629,15 K | 1356 °C | 2472,8 °F
Kogepunkt
3503,15 K | 3230 °C | 5846 °F
Smeltevarme
10,8 kJ/mol
Fordampningsvarme
295 kJ/mol
Varmefylde
0,182 J/g·K
Forekomst i jordskorpen
0,000093%
Forekomst i universet
5×10-8%
CAS-nummer
7440-27-9
PubChem CID-nummer
23958
Atomare egenskaber
Atomradius
177 pm
Kovalent radius
194 pm
Elektronegativitet
1,2 (Paulings skala)
Ioniseringspotentiale
5,8638 eV
Atomvolumen
19,20 cm3/mol
Varmeledningsevne
0,111 W/cm·K
Oxidationstrin
1, 3, 4
Anvendelser
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
Isotoper
Stabile isotoper
159TbUstabile isotoper
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