- a rare metallic element, soft, white, malleable, and easily fusible, found combined in various ore minerals, especially sphalerite: so called from the two indigo-blue lines in its spectrum. Symbol: In; atomic weight: 114.82; atomic number: 49; specific gravity: 7.3 at 20°C.
Origin of indium
Examples from the Web for indium
Historical Examples of indium
Lecoq de Boisbaudran and E. Jungfleisch, on the extraction of gallium from the ores in which it is found associated with indium.
The following process for the detection of indium in zinc-blende, and its extraction from the same source, is given by Winkler.
When examined by means of the spectroscope, the flame of indium reveals two brilliant bands—a violet and a blue one.
Precipitation with sulphuretted hydrogen does not give exact results on account of the solubility of the indium sulphide.
III a.—Aluminium, gallium and indium were examined from this group.Occult Chemistry
Annie Besant and Charles W. Leadbeater
- a rare soft silvery metallic element associated with zinc ores: used in alloys, electronics, and electroplating. Symbol: In; atomic no: 49; atomic wt: 114.82; valency: 1, 2, or 3; relative density: 7.31; melting pt: 156.63°C; boiling pt: 2073°C
Word Origin for indium
- A soft malleable metallic element found primarily in ores of zinc, used in making dental alloys and in its radioisotope forms in diagnostic radiology. Atomic number 49.
- A soft, malleable, silvery-white metallic element that occurs mainly in ores of zinc and lead. It is used in the manufacture of semiconductors, in bearings for aircraft engines, and as a plating over silver in mirrors. Atomic number 49; atomic weight 114.82; melting point 156.61°C; boiling point 2,080°C; specific gravity 7.31; valence 1, 2, 3. See Periodic Table.