Indium (In)

Adopted by Roxana Peregrina

Physical and Chemical Proterties

Indium is an element that is shinny and has sort of a gray/silver color to it. Indium is not a hard element its hardness is about 1.2 which means its actually kind of soft. The atomic mass of indium is 114.818, its atomic radius is 167pm and its density is 7.31g/cm3. Indium is a solid at 22 degrees celsius but melts at the point of of 156.60 degrees celsius and boils at the point of 2027 degrees celsius. Indium's mellability,flammability, and reactivity are still unknown but it's conductivity is known and it is 81.8W(m . K).

History and Discovery

Induim was discovered in at the Freiberg School of Mines in Germany in 1863, by Ferdinand Reich with the help of Hieronymous Richter. During this time Ferdinand Reich was trying to investigate the mineral zinc blende to see if it had thallium in it. When he did this he saw a yellow percipitate, which he thought was thallium sulfide. Although in his atomic spectroscope it showed lines but they weren't from thallium. To check the spectrum Reich asked Hieronymous Richter because he was color blind and wasn't able to do it. When Richter saw the spectrume he saw a violet line and this violet led to the name of the element to be Indium. Reich and Richter worked together to show the discovery of the new element but they stop working together when Richter took credit.

Identifying Information

Atomic Structure

Atomic number:49

Mass number:144.818




Location on the Periodic Table

On the periodic table, Indium is located on period 5 and is in group 13.

Applications and Uses

Ways that Indium is most commonly used/found

  • flat screen tvs
  • touch screens
  • solar panels

  • Indium has 39 isotopes, two of the stable isotopes are indium-113 and indium-115.

Compounds that Indium forms that have important uses

  • Indium tin oxide
  • Indium nitride
  • Indium phosphide
  • Indium antimonide

Pictures of Appications

Fun Facts

  • The name of the element Indium comes from the Latin word indicium,which stands for violet
  • There is an Indium coin
  • You aren't able to see indium tin oxide

Pictures Sources