Siteseen Logo

The Element Indium


"The Atom"

Definition of the Indium Element
A soft, malleable, silvery-white metallic element found primarily in ores of Zinc and Tin, used as a plating over Silver in making mirrors, in plating aircraft bearings, and in compounds for making transistors. Indium is stable in air and in water but dissolves in acids. When heated above its melting point it ignites burning with a violet flame. The Atomic Number of this element is 49 and the Element Symbol is In.

The Properties of the Indium Element
Symbol of Element : In
Atomic Number : 49
Atomic Mass: 114.818 amu
Melting Point: 156.61 C - 429.76 K
Boiling Point: 2000.0 C - 2273.15 K
Number of Protons/Electrons: 49
Number of Neutrons : 66
Crystal Structure: Tetragonal
Density @ 293 K: 7.31 g/cm3
Color : silvery-white

Origin / Meaning of the name Indium
The name originates from the color Indigo in its atomic spectrum.

Periodic Table Group and Classification of the of the Indium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Indium is classified in the 'Other Metals' section which can be located in groups 13, 14, and 15 of the Periodic Table. All of these elements are solid, have a relatively high density and are opaque. Nearly 75% of all the elements in the Periodic Table are classified as metals which are detailed in the List of Metals.

Facts about the Discovery & History of the Indium Element
Indium was discovered by Ferdinand Reich and Theodor Richter in Germany in 1863. Richter  isolated the metal in 1867.

History of the Periodic Table
Check out the brief History of the Periodic Table which details dates and the names of famous scientists and chemists who contributed to the development of the Periodic Table.

Occurrence of the Indium Element
From residues generated during zinc ore processing / refining
Found in Iron, Lead, and Copper ores
Canada is the leading producer

Abundances of the element in different environments
% in Universe 310-8%
% in Sun 410-7%
% in Meteorites 4.410-6%
% in Earth's Crust 0.000016%
% in Oceans 110-11%
% in Humans N/A

Associated Uses of Indium
Coating of high-speed bearings
Indium-tin-oxide thin films for liquid crystal displays (LCD)
Making mirrors
Making transistors

Site Index
List of Metals
Periodic Law
Periodic Table
Periodic Table

Privacy Statement

Cookie Policy

2017 Siteseen Ltd