Titanium(III) oxide

Titanium sesquioxide

Dark purple solid

Fixed

4.49 g · cm -3 ( 25 ° C)

1839 ° C

3000 ° C.

Insoluble in water, hydrochloric acid and nitric acid

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Titanium (III ) oxide is an inorganic chemical compound of titanium selected from the group of the oxides.

Production and representation

Titanium (III ) oxide can be obtained by reacting titanium with a titanium ( IV) oxide at 1600 ° C.

It can also be represented by the reaction of carbon monoxide with titanium ( IV) oxide at 800 ° C.

Properties

Titanium (III ) oxide is a dark purple to black powder that is insoluble in water. It dissolves in sulfuric acid with a violet color of the acid. When heated with hydrofluoric acid and aqua regia decomposition takes place. Its crystal structure is hexagonal, isostructural to that of corundum with space group R3c (a = 514.8 pm, c = 1363.6 pm ). The connection exists in the range of TiO1, 49 to TiO1, 51 Below 200 ° C, it is a semiconductor, over a metallic conductor.

Use

Titanium (III ) oxide is used as the starting material for the interference layer, the thin film resistors and capacitors.