Indium Facts

Indium Facts
Indium (In) has an atomic number of forty-nine. This brilliantly lustrous metal has forty-nine protons in the nucleus of its atoms.
Interesting Indium Facts:
Friedrich Reich and Theodor Richter discovered indium in 1863.
After isolating zinc chloride from several minerals, they searched for the element thallium using spectroscopy.
Instead of thallium, they discovered a new element that emitted a deep blue spectral line, hence its name, indium (indigo).
In the Earth's crust, it is the 61st most common element.
Indium is found in the crust at around forty-nine parts per billion, or about as common as mercury.
There are less than ten known indium minerals, and none are found in major deposits on Earth.
Indium is a poor metal, as its melting and boiling points are lower than the transition metals.
Indium does not react with water.
There are thirty-nine known indium isotopes, but only one of them is considered stable.
Of the unstable isotopes, the two most stable have half-lives of more than one hundred trillion years, and 2.8 days.
All of the remaining unstable indium isotopes have half-lives of less than five hours.
Indium is characterized by a high-pitched screaming or crackling sound when it is bent, which is a phase change at its structure's atomic level.
Decades after its discovery, indium's most valuable use was discovered, which was stabilizing non-ferrous metals.
Indium is extracted predominantly from the dust and slag leftover during zinc production.
It is also found in copper, iron, and lead ores.
Indium production is currently about 475 tons per year from extraction, and another 650 tons per year from recycling.
Demand for indium has increased greatly since it is used in the production of LCD monitors, televisions, and display screens.
Due to demand for this application, the price of indium per kilogram has increased almost tenfold since 2002.

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