The high efficiency of the pulsed sputtering method makes it possible to record one count due to indium at the detector for only four atoms of indium sputtered from the solid silicon target. Indium is softer than lead and quite plastic. It can be scratched with a fingernail and can undergo almost limitless deformation. If you have a question you can search for the answer below! Indium is an amphoteric element; it dissolves in acids to give indium salts, and it also dissolves in concentrated alkalies to give indates. It is also used to make other electrical components such as rectifiers, thermistors and photoconductors. Indium is softer than lead and quite plastic. The metal is extensively employed in the manufacture of semiconductor devices and for soldering various parts of germanium transistors and rectifiers. Indium is also used to make low melting alloys. Our editors will review what you’ve submitted and determine whether to revise the article. A brilliant indigo line in the sample's spectrum revealed the existence of indium. Updates? Indium has the unusual property when molten of clinging to (wetting) clean glass and other surfaces; this makes it valuable for producing hermetic seals between glass, metals, quartz, ceramics, and marble. It was discovered (1863) by German chemists Ferdinand Reich and Hieronymus Theodor Richter while they were examining zinc ore samples. Reich was investigating a sample of the mineral zinc blende (now known as sphalerite, ZnS) which he believed might contain the recently discovered element thallium. An alloy of 24% indium and 76% gallium is a liquid at room temperature. Articles from Britannica Encyclopedias for elementary and high school students. Reich and Richter had been looking for traces of the element thallium in samples of zinc ores. The presence of a predominant indigo spectral line suggested the name. I hope you find an answer to your question, but if your don't then please send me your question via email, comment or via Google+ and I'll try and answer it. All Rights Reserved by wanttoknowit.com. It was found and spectroscopically identified as a minor component in zincores. Indium is used to dope germanium to make transistors. Indium was discovered in 1863 by Ferdinand Reich at the Freiberg School of Mines in Germany. This was confirmed not long after and a year later Richter was able to isolate the pure metal. Indium was discovered by Ferdinand Reich and Theodore Richter, who later isolated the metal. He suspected this could be the sulfide of a new element, but since he was color blind, he asked fellow German chemis… Indium is used to coat the bearings of high speed motors since it allows for the even distribution of lubricating oil. It was discovered (1863) by German chemists Ferdinand Reich and Hieronymus Theodor Richter while they were examining zinc ore samples. Say what? This oxide is easily reduced to the metal, and on strong heating it loses oxygen to give the monoxide, In2O, where indium is in the +1 oxidation state. Aluminum, gallium, indium, and thallium are silvery white…, …method can detect, for example, indium in silicon at the one part per trillion level. Copyright © 2017. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... 118 Names and Symbols of the Periodic Table Quiz. This article was most recently revised and updated by, https://www.britannica.com/science/indium, Kansapedia - Kansas Historical Society - Biography of Clyde Cessna, indium - Student Encyclopedia (Ages 11 and up). All anhydrous triply charged indium derivatives except indium trifluoride (InF3) are covalent. He then observed a yellowish solid appear. It is a post-transition metal that makes up 0.21 parts per million of the Earth's crust. Instead of seeing the green lines associated with thallium they noticed a bright blue line. Indium is used in coating aircraft engine bearings because it improves corrosion resistance and enables the surface to retain a more adherent oil film. Indium was discovered in 1863 when German Chemists Ferdinand Reich and Hieronymous Theodor Richter tested ores from Saxony at the Freiberg University of Mining and Technology where they worked. It is an ingredient in some low-melting alloys used in sprinkler heads, fire-door links, and fusible plugs. Indium hydroxide dissolves in both acids and alkalies. Britannia Kids Holiday Bundle! … Indium was discovered by the German chemists Ferdinand Reich and Hieronymus Theodor Richter in 1863. Indium was discovered by Ferdinand Reich and Theodore Richter, who later isolated the metal. Indium metal is unaffected by air at ordinary temperatures, but at a red heat it burns with a blue-violet flame to form the yellow oxide In2O3.