Indium

Images

Image

Attribution: Nerdtalker

Animated Indium

History

From the brilliant indigo line in its spectrum. Discovered by Reich and Richter, who later isolated the metal. Until 1924, a gram or so constituted the world's supply of this element in isolated form. It is probably about as abundant as silver. About 4 million troy ounces of indium are now produced annually in the Free World. Canada is presently producing more than 1,000,000 troy ounces annually.

Sources

Indium is most frequently associated with zinc materials, and it is from these that most commercial indium is now obtained; however, it is also found in iron, lead, and copper ores.

Uses

It has found application in making low-melting allows; an allow of 24% indium - 76% gallium is liquid at room temperature. It is used in making bearing alloys, germanium transistors, rectifiers, thermistors, and photoconductors. It can be plated onto metal and evaporated onto glass, forming a mirror as good as that made with silver but with more resistance to atmospheric corrosion.

General Info

AtomicNumber
49
Symbol
In
Name
Indium

Atomic Info

Appearance
AtomicWeight
114.818(3)
Color
A67573
ElectronicConfiguration
[Kr] 4d10 5s2 5p1
ElectronegativityInPauling
1.78
AtomicRadiusInPM
144
IonRadiusInPM
80 (+3)
VanDerWaalsRadiusInPM
193
IEinKJmol
558
EAinKJmol
-29
OxidationStates
1, 2, 3
StandardState
solid
BondingType
metallic
MeltingPoint
430
BoilingPoint
2345
Density
7.31
State
Post-transition metal
DiscoveredYear
1863