Indium (III) oxide

Crystal structure
	__ In 3+ __ O 2−
General
Surname	Indium (III) oxide
other names	Diindium trioxide
Ratio formula	In 2 O 3
Brief description	yellow powder
External identifiers / databases
EC number	215-193-9
ECHA InfoCard	100,013,813
PubChem	150905
ChemSpider	133007
Wikidata	Q424955
properties
Molar mass	277.64 g mol −1
Physical state	firmly
density	7.18 g cm −3
Melting point	1910 ° C
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: no H-phrases
	P: no P-phrases
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Indium (III) oxide is a chemical compound of indium and oxygen . The air-stable, light yellow oxide is a semiconductor .

Extraction and presentation

Indium (III) oxide is formed from the elements at high temperatures under a blue flame .

{\ displaystyle \ mathrm {4 \ In \ + \ 3 \ O_ {2} \ \ longrightarrow \ 2 \ In_ {2} O_ {3}}}

Indium (III) oxide is also formed from indium (III) hydroxide when heated.

{\ displaystyle \ mathrm {2 \ In (OH) _ {3} \ longrightarrow \ In_ {2} O_ {3} +3 \ H_ {2} O}}

properties

There are two modifications of the light yellow colored indium (III) oxide. The α-modification, which is stable under normal conditions, changes under pressure at 1000 ° C into a β-modification. α-Indium (III) oxide crystallizes in a structure which can be derived from the calcium fluoride structure and in which there are fluoride vacancies. β-indium (III) oxide has a corundum structure .

Thin-film layers of indium (III) oxide, which are doped with chromium (In _2-x Cr _x O ₃ ), have ferromagnetic properties and are among the magnetic semiconductors .

use

Indium (III) oxide is mainly used to make indium tin oxide . This is an important part of liquid crystal displays and touch screens . The mixed oxide of manganese , yttrium and indium results in a brilliant blue pigment, the YInMn blue . The general formula is YIn _1-x Mn _x O ₃ If it does not contain manganese, the oxide is colorless, if it does not contain indium, it is black.

Individual evidence

↑ ^a ^b ^c ^d ^e data sheet Indium (III) oxide, 99.994% (metals basis) from AlfaAesar, accessed on December 7, 2019 ( PDF )(JavaScript required) .
^ O. Knacke, O. Kubaschewski, K. Hesselmann (eds.): Thermochemical properties of inorganic substances I. 2nd edition, Springer, Berlin, 1991.
↑ Nicole Hemsoth: MIT Material Puts New Spin on Electronics. In: hpcwire.com. May 6, 2006, accessed October 29, 2008 .
↑ Andrew E. Smith, Hiroshi Mizoguchi, Kris Delaney, Nicola A. Spaldin, Arthur W. Sleight, MA Subramanian: Mn in Trigonal Bipyramidal Coordination: A New Blue Chromophore. In: Journal of the American Chemical Society . 131, 2009, pp. 17084-17086, doi: 10.1021 / ja9080666 .

literature

AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 .

[alfa-1] ↑ ^a ^b ^c ^d ^e data sheet Indium (III) oxide, 99.994% (metals basis) from AlfaAesar, accessed on December 7, 2019 ( PDF )(JavaScript required) .

[Knacke-2] O. Knacke, O. Kubaschewski, K. Hesselmann (eds.): Thermochemical properties of inorganic substances I. 2nd edition, Springer, Berlin, 1991.

[3] Nicole Hemsoth: MIT Material Puts New Spin on Electronics. In: hpcwire.com. May 6, 2006, accessed October 29, 2008 .

[DOI10.1021/ja9080666-4] Andrew E. Smith, Hiroshi Mizoguchi, Kris Delaney, Nicola A. Spaldin, Arthur W. Sleight, MA Subramanian: Mn in Trigonal Bipyramidal Coordination: A New Blue Chromophore. In: Journal of the American Chemical Society . 131, 2009, pp. 17084-17086, doi: 10.1021 / ja9080666 .