Terbium

Images

Image

Attribution: images-of-elements.com

Animated Terbium

History

Discovered by Mosander in 1843. Terbium is a member of the lanthanide or "rare earth" group of elements. It is found in cerite, gadolinite, and other minerals along with other rare earths. It is recovered commercially from monazite in which it is present to the extent of 0.03%, from xenotime, and from euxenite, a complex oxide containing 1% or more of terbia.

Uses

Sodium terbium borate is used in solid-state devices. It can be used with ZrO2 as a crystal stabilizer of fuel cells which operate at elevated temperature. Few other uses have been found.

General Info

AtomicNumber
65
Symbol
Tb
Name
Terbium

Atomic Info

Appearance
AtomicWeight
158.92535(2)
Color
30FFC7
ElectronicConfiguration
[Xe] 4f9 6s2
ElectronegativityInPauling
1.2
AtomicRadiusInPM
IonRadiusInPM
92.3 (+3)
VanDerWaalsRadiusInPM
IEinKJmol
566
EAinKJmol
-50
OxidationStates
1, 3, 4
StandardState
solid
BondingType
metallic
MeltingPoint
1629
BoilingPoint
3503
Density
8.22
State
Lanthanide
DiscoveredYear
1843