Difference between revisions of "Indium"
Jump to navigation
Jump to search
m (change density terminology) |
DavidB4-bot (talk | contribs) (→top: clean up & uniformity) |
||
| (8 intermediate revisions by 4 users not shown) | |||
| Line 1: | Line 1: | ||
| − | {{Element | name=Indium | symbol=In | anumber=49 | amass=114.818 amu | state=Solid | class=Poor Metals | cstructure=Face-centered tetragonal | color=Silvery-white | date=1863 | discname=Ferdinand Reich and Hieronymous Richter | origname=From the indigo blue it shows in a spectroscope. | uses=Used as a coating for high speed bearings, in mirrors, solar cells, nuclear power regulators, photo cells, thermistors, and | + | {{Element | name=Indium | symbol=In | anumber=49 | amass=114.818 amu | state=Solid | class=Poor Metals | cstructure=Face-centered tetragonal | density=7.310 g/cm^3 | color=Silvery-white | stableisotopes=2 | date=1863 | discname=Ferdinand Reich and Hieronymous Richter | origname=From the indigo blue it shows in a spectroscope. | uses=Used as a coating for high speed bearings, in high-quality mirrors, solar cells, nuclear power regulators, photo cells, thermistors, transistors, and LCD displays. Also employed in low-melting alloys for safety devices. | obtained=Found in some zinc ores, but is primarily produced as a by-product of lead and zinc smelting. }} |
| − | '''Indium''' is an [[element]] in the "poor metals" class (beyond the transition metals, before the nonmetals) of the [[periodic table of the elements|periodic table]]. It is soft and silvery-white. It is stable in air and water, but dissolves in acids | + | '''Indium''' is an [[element]] in the "poor metals" class (beyond the transition metals, before the nonmetals) of the [[periodic table of the elements|periodic table]]. It is soft and silvery-white. It is stable in air and water, but dissolves in acids. It has two stable isotopes (actually one, but another one has a [[half-life]] of over 10<sup>14</sup> years). |
| + | |||
| + | Indium was discovered [[spectroscope|spectroscopically]] (many 19th century element discoveries were made this way) while searching for thallium in zinc ores. | ||
| + | |||
| + | Indium oxide, mixed with a small amount of [[tin(II) oxide]], has the remarkable and very useful property of being a transparent [[conductance|conductor]] of electricity. This makes it useful as the front electrode of [[Liquid crystal display (LCD)|liquid crystal displays (LCD)]]. | ||
[[Category:Elements]] | [[Category:Elements]] | ||
| + | {{Periodic table}} | ||
Latest revision as of 14:19, July 13, 2016
Indium is an element in the "poor metals" class (beyond the transition metals, before the nonmetals) of the periodic table. It is soft and silvery-white. It is stable in air and water, but dissolves in acids. It has two stable isotopes (actually one, but another one has a half-life of over 1014 years).
| Indium | |
|---|---|
| Properties | |
| Atomic symbol | In |
| Atomic number | 49 |
| Classification | Poor Metals |
| Atomic mass | 114.818 amu |
| Number of Stable Isotopes | 2 |
| Density (grams per cc) | 7.310 g/cm^3 |
| Other Information | |
| Date of discovery | 1863 |
| Name of discoverer | Ferdinand Reich and Hieronymous Richter |
| Name origin | From the indigo blue it shows in a spectroscope. |
| Uses | Used as a coating for high speed bearings, in high-quality mirrors, solar cells, nuclear power regulators, photo cells, thermistors, transistors, and LCD displays. Also employed in low-melting alloys for safety devices. |
| Obtained from | Found in some zinc ores, but is primarily produced as a by-product of lead and zinc smelting. |
Indium was discovered spectroscopically (many 19th century element discoveries were made this way) while searching for thallium in zinc ores.
Indium oxide, mixed with a small amount of tin(II) oxide, has the remarkable and very useful property of being a transparent conductor of electricity. This makes it useful as the front electrode of liquid crystal displays (LCD).