Terbi
65
Tb
Grup
n/a
Període
6
Bloc
f
Protons
Electrons
Neutrons
65
65
94
Propietats Generals
Nombre atòmic
65
Massa atòmica
158,92535
Nombre de massa
159
Categoria
Lantànids
Color
Plata
Radioactiu
No
Terbium was named after Ytterby, a town in Sweden
Estructura cristal·lina
Hexàgon simple
Història
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.
Electrons per capa
2, 8, 18, 27, 8, 2
Configuració electrònica
[Xe] 4f9 6s2
Terbium is soft enough to be cut with a knife
Propietats Físiques
Fase
Sòlid
Densitat
8,229 g/cm3
Punt de fusió
1629,15 K | 1356 °C | 2472,8 °F
Punt d'ebullició
3503,15 K | 3230 °C | 5846 °F
Entalpia de fusió
10,8 kJ/mol
Entalpia de vaporització
295 kJ/mol
Capacitat tèrmica específica
0,182 J/g·K
Abundància a l'escorça terrestre
0,000093%
Abundància a l'univers
5×10-8%
Número CAS
7440-27-9
Número CID de PubChem
23958
Propietats Atòmiques
Radi atòmic
177 pm
Radi covalent
194 pm
Electronegativitat
1,2 (Escala de Pauling)
Potencial d'ionització
5,8638 eV
Volum atòmic
19,20 cm3/mol
Conductivitat tèrmica
0,111 W/cm·K
Estats d'oxidació
1, 3, 4
Aplicacions
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
Isòtops
Isòtops estables
159TbIsòtops inestables
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