Indium (III) oxide

Indium oxide
Indium oxide
General
Systematic ; name	Indium oxide
Chem. formula	In 2 O 3
Physical properties
condition	light yellow crystals
Molar mass	277.64 g / mol
Density	7.179 g / cm³
Thermal properties
T. melt.	1910 ° C
T. bale.	≈3300 ° C
Like heat resistant.	92 J / (mol · K)
Enthalpy of Education	-926 kJ / mol
Classification
Reg. CAS number	1312-43-2
PubChem
Reg. EINECS number
Smiles
Inchi
ChemSpider

Indium oxide - a binary inorganic compound of indium metal and oxygen with the formula In ₂ O ₃ , light yellow crystals, a semiconductor .

Content

1 Receiving
2 Physical properties
3 Chemical properties
4 Application
5 See also
6 Literature

Getting

When heated, indium burns with a violet flame:

{\mathsf {4In+3O_{2}\ {\xrightarrow {>800^{o}C}}\ 2In_{2}O_{3}}}

{\ displaystyle {\ mathsf {4In + 3O_ {2} \ {\ xrightarrow {> 800 ^ {o} C}} \ 2In_ {2} O_ {3}}}}

Thermal decomposition of indium hydroxide :

{\mathsf {2In(OH)_{3}\ {\xrightarrow {350^{o}C}}\ In_{2}O_{3}+3H_{2}O}}

{\ displaystyle {\ mathsf {2In (OH) _ {3} \ {\ xrightarrow {350 ^ {o} C}} \ In_ {2} O_ {3} + 3H_ {2} O}}}

indium nitrate :

{\mathsf {4In(NO_{3})_{3}\ {\xrightarrow {230^{o}C}}\ 2In_{2}O_{3}+12NO_{2}+3O_{2}}}

{\ displaystyle {\ mathsf {4In (NO_ {3}) _ {3} \ {\ xrightarrow {230 ^ {o} C}} \ 2In_ {2} O_ {3} + 12NO_ {2} + 3O_ {2} }}}

indium sulfate :

{\mathsf {2In_{2}(SO_{4})_{3}\ {\xrightarrow {>600^{o}C}}\ 2In_{2}O_{3}+6SO_{2}+3O_{2}}}

{\ displaystyle {\ mathsf {2In_ {2} (SO_ {4}) _ {3} \ {\ xrightarrow {> 600 ^ {o} C}} \ 2In_ {2} O_ {3} + 6SO_ {2} + 3O_ {2}}}}

Indium Sulfide Oxidation:

{\mathsf {2In_{2}S_{3}+9O_{2}\ {\xrightarrow {650^{o}C}}\ 2In_{2}O_{3}+6SO_{2}}}

{\ displaystyle {\ mathsf {2In_ {2} S_ {3} + 9O_ {2} \ {\ xrightarrow {650 ^ {o} C}} \ 2In_ {2} O_ {3} + 6SO_ {2}}}}

Physical Properties

Indium oxide - an amorphous substance or light yellow crystals (red-brown when heated), forms cubic syngony crystals, space group I a3 , cell parameters a = 1.01194 nm, Z = 16. At a pressure of 6.5 GPa and a temperature of 300 -400 ° C goes into phase with a hexagonal lattice , which is stable under normal conditions. The crystals belong to the space group R 3c , cell parameters a = 0.5487 nm, c = 1.4510 nm, Z = 6, density 7.3 g / cm³.

At an excess pressure, oxygen melts at 1910 ° C, and under ordinary conditions it easily sublimates and begins to decompose at 850 ° C.

Chemical Properties

When heated, sublimates with decomposition:

{\mathsf {In_{2}O_{3}\ {\stackrel {\xrightarrow {1000^{o}C}}{\xleftarrow[{\ \ \ \ \ \ }]{}}}\ In_{2}O+O_{2}}}

{\ displaystyle {\ mathsf {In_ {2} O_ {3} \ {\ stackrel {\ xrightarrow {1000 ^ {o} C}} {\ xleftarrow [{\ \ \ \ \ \}] {}}} \ In_ {2} O + O_ {2}}}}

Reacts with concentrated acids:

{\mathsf {In_{2}O_{3}+6HCl\ {\xrightarrow {}}\ 2InCl_{3}+3H_{2}O}}

{\ displaystyle {\ mathsf {In_ {2} O_ {3} + 6HCl \ {\ xrightarrow {}} \ 2InCl_ {3} + 3H_ {2} O}}}

and alkalis during fusion:

{\mathsf {In_{2}O_{3}+2NaOH\ {\xrightarrow {500^{o}C}}\ 2NaInO_{2}+H_{2}O}}

{\ displaystyle {\ mathsf {In_ {2} O_ {3} + 2NaOH \ {\ xrightarrow {500 ^ {o} C}} \ 2NaInO_ {2} + H_ {2} O}}}

It is restored by hydrogen to metal:

{\mathsf {In_{2}O_{3}+3H_{2}\ {\xrightarrow {700^{o}C}}\ 2In+3H_{2}O}}

{\ displaystyle {\ mathsf {In_ {2} O_ {3} + 3H_ {2} \ {\ xrightarrow {700 ^ {o} C}} \ 2In + 3H_ {2} O}}}

When calcined in a stream of ammonia forms indium nitride :

{\mathsf {In_{2}O_{3}+2NH_{3}\ {\xrightarrow {600^{o}C}}\ 2InN+3H_{2}O}}

{\ displaystyle {\ mathsf {In_ {2} O_ {3} + 2NH_ {3} \ {\ xrightarrow {600 ^ {o} C}} \ 2InN + 3H_ {2} O}}}

Reacts with hydrogen sulfide :

{\mathsf {In_{2}O_{3}+3H_{2}S\ {\xrightarrow {500^{o}C}}\ In_{2}S_{3}+3H_{2}O}}

{\ displaystyle {\ mathsf {In_ {2} O_ {3} + 3H_ {2} S \ {\ xrightarrow {500 ^ {o} C}} \ In_ {2} S_ {3} + 3H_ {2} O} }}

Application

For transparent conductive films.
In a mixture with Ag ₂ O as a material for electrical contacts.
Component of special glasses, neutron absorbers.
Semiconductor material.

Literature

Chemical Encyclopedia / Editorial Board: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1990. - T. 2. - 671 p. - ISBN 5-82270-035-5 .
Lidin R.A. and other Chemical properties of inorganic substances: Textbook. manual for universities. - 3rd ed., Rev. - M .: Chemistry, 2000 .-- 480 p. - ISBN 5-7245-1163-0 .
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 2nd ed., rev. - M.-L.: Chemistry, 1966. - T. 1. - 1072 p.
Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
Ripan R., Chetyanu I. Inorganic chemistry. Chemistry of metals. - M .: Mir, 1971. - T. 1. - 561 p.

Indium oxide
General
Systematic name	Indium oxide
Chem. formula	In ₂ O ₃
Physical properties
condition	light yellow crystals
Molar mass	277.64 g / mol
Density	7.179 g / cm³
Thermal properties
T. melt.	1910 ° C
T. bale.	≈3300 ° C
Like heat resistant.	92 J / (mol · K)
Enthalpy of Education	-926 kJ / mol
Classification
Reg. CAS number	1312-43-2
PubChem
Reg. EINECS number
Smiles
Inchi
ChemSpider