Titanium(III) oxide

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Titanium(III) oxide
Corundum struct.png
IUPAC name
titanium(III) oxide
Other names
titanium sesquioxide
3D model (JSmol)
ECHA InfoCard 100.014.271 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 215-697-9
PubChem CID
  • InChI=1S/3O.2Ti
  • O=[Ti]O[Ti]=O
Molar mass 143.76 g/mol
Appearanceviolet black powder
Odor odorless
Density 4.49 g/cm3
Melting point 2,130 °C (3,870 °F; 2,400 K)(decomposes)
+125.6·10−6 cm3/mol
Structure [1]
R3c (No. 167)
a = 543 pm
α = 56.75°, β = 90°, γ = 90°
GHS labelling: [2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Titanium(III) oxide is the inorganic compound with the formula Ti2 O3. A black semiconducting solid, it is prepared by reducing titanium dioxide with titanium metal at 1600 °C. [3]

Ti2O3 adopts the Al2O3 (corundum) structure. [3] It is reactive with oxidising agents. [3] At around 200 °C there is a transition from semiconducting to metallic conducting. [3] Titanium(III) oxide occurs naturally as the extremely rare mineral tistarite. [4]

Other titanium(III) oxides include LiTi2O4 and LiTiO2. [5]

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Titanium dioxide Chemical compound

Titanium dioxide, also known as titanium(IV) oxide or titania, is the inorganic compound with the chemical formula TiO
. When used as a pigment, it is called titanium white, Pigment White 6 (PW6), or CI 77891. It is a white, water-insoluble solid, although mineral forms can appear black. As a pigment, it has a wide range of applications, including paint, sunscreen, and food coloring. When used as a food coloring, it has E number E171. World production in 2014 exceeded 9 million tonnes. It has been estimated that titanium dioxide is used in two-thirds of all pigments, and pigments based on the oxide have been valued at $13.2 billion.

Armalcolite Oxide mineral

Armalcolite is a titanium-rich mineral with the chemical formula (Mg,Fe2+)Ti2O5. It was first found at Tranquility Base on the Moon in 1969 during the Apollo 11 mission, and is named for Armstrong, Aldrin and Collins, the three Apollo 11 astronauts. Together with tranquillityite and pyroxferroite, it is one of three new minerals that were discovered on the Moon. Armalcolite was later identified at various locations on Earth and has been synthesized in the laboratory. (Tranquillityite and pyroxferroite were also later found at various locations on Earth). The synthesis requires low pressures, high temperatures and rapid quenching from about 1,000 °C to the ambient temperature. Armalcolite breaks down to a mixture of magnesium-rich ilmenite and rutile at temperatures below 1,000 °C, but the conversion slows down with cooling. Because of this quenching requirement, armalcolite is relatively rare and is usually found in association with ilmenite and rutile, among other minerals.

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Titanium hydride Chemical compound

Titanium hydride normally refers to the inorganic compound TiH2 and related nonstoichiometric materials. It is commercially available as a stable grey/black powder, which is used as an additive in the production of Alnico sintered magnets, in the sintering of powdered metals, the production of metal foam, the production of powdered titanium metal and in pyrotechnics.

Organotitanium compound

Organotitanium compounds in organometallic chemistry contain carbon-titanium chemical bonds. Organotitanium chemistry is the science of organotitanium compounds describing their physical properties, synthesis and reactions. They are reagents in organic chemistry and are involved in major industrial processes.

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Titanium diselenide Chemical compound

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Titanium nitrate is the inorganic compound with formula Ti(NO3)4. It is a colorless, diamagnetic solid that sublimes readily. It is an unusual example of a volatile binary transition metal nitrate. Ill defined species called titanium nitrate are produced upon dissolution of titanium or its oxides in nitric acid.

Titanium perchlorate Chemical compound

Titanium perchlorate is a molecular compound of titanium and perchlorate groups with formula Ti(ClO4)4. Anhydrous titanium perchlorate decomposes explosively at 130 °C and melts at 85 °C with a slight decomposition. It can sublime in a vacuum as low as 70 °C, and can form vapour at up to 120°. Titanium perchlorate is quite volatile. It has density 2.35. It decomposes to TiO2, ClO2 and dioxygen O2 Also TiO(ClO4)2 is formed during decomposition.

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