Tellurium trioxide Names |
Other names tellurium(VI) oxide |
Identifiers |
CAS Number | - 13451-18-8 Y
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3D model (JSmol) | |
ChemSpider | - 75319 Y
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ECHA InfoCard | 100.033.277 |
EC Number | |
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UNII | - GC5SXW83F8 Y
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| - DTXSID6065472
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InChI=1S/O3Te/c1-4(2)3 YKey: IIXQANVWKBCLEB-UHFFFAOYSA-N YInChI=1/O3Te/c1-4(2)3 Key: IIXQANVWKBCLEB-UHFFFAOYAH |
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Properties |
Chemical formula | TeO3 |
Molar mass | 175.6 g/mol |
Appearance | yellow-orange crystals (α-TeO3) |
Density | 5.07 g/cm3, solid |
Melting point | 430 °C (806 °F; 703 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references |
Chemical compound
Tellurium trioxide (TeO3) is an inorganic chemical compound of tellurium and oxygen. In this compound, tellurium is in the +6 oxidation state.
Polymorphs
There are two forms, yellow-red α-TeO3 and grey, rhombohedral, β-TeO3 which is less reactive.[1]
α-TeO3 has a structure similar to FeF3 with octahedral TeO6 units that share all vertices.[2]
Preparation
α-TeO3 can be prepared by heating orthotelluric acid, Te(OH)6, at over 300 °C.[1] The β-TeO3 form can be prepared by heating α-TeO3 in a sealed tube with O2 and H2SO4.
α-TeO3 is unreactive to water but is a powerful oxidising agent when heated.[2] With alkalis it forms tellurates.[2]
α-TeO3 when heated loses oxygen to form firstly Te2O5 and then TeO2.[1]
References
- ^ a b c Inorganic Chemistry,Egon Wiberg, Arnold Frederick Holleman Elsevier 2001 ISBN 0-12-352651-5
- ^ a b c Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
- Te2Br
- TeBr4
- Te3Cl2
- TeCl2
- TeCl4
- TeF4
- TeF6
- TeI
- TeI4
- TeO
- TeO2
- TeO3
- HOTeF5
- TeN
- TeO2−
4+TeO2− 3 |
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Mixed oxidation states | |
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+1 oxidation state | |
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+2 oxidation state | |
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+3 oxidation state | - Actinium(III) oxide (Ac2O3)
- Aluminium oxide (Al2O3)
- Americium(III) oxide (Am2O3)
- Antimony trioxide (Sb2O3)
- Arsenic trioxide (As2O3)
- Berkelium(III) oxide (Bk2O3)
- Bismuth(III) oxide (Bi2O3)
- Boron trioxide (B2O3)
- Caesium sesquioxide (Cs2O3)
- Californium(III) oxide (Cf2O3)
- Cerium(III) oxide (Ce2O3)
- Chromium(III) oxide (Cr2O3)
- Cobalt(III) oxide (Co2O3)
- Dinitrogen trioxide (N2O3)
- Dysprosium(III) oxide (Dy2O3)
- Einsteinium(III) oxide (Es2O3)
- Erbium(III) oxide (Er2O3)
- Europium(III) oxide (Eu2O3)
- Gadolinium(III) oxide (Gd2O3)
- Gallium(III) oxide (Ga2O3)
- Gold(III) oxide (Au2O3)
- Holmium(III) oxide (Ho2O3)
- Indium(III) oxide (In2O3)
- Iron(III) oxide (Fe2O3)
- Lanthanum oxide (La2O3)
- Lutetium(III) oxide (Lu2O3)
- Manganese(III) oxide (Mn2O3)
- Neodymium(III) oxide (Nd2O3)
- Nickel(III) oxide (Ni2O3)
- Phosphorus trioxide (P4O6)
- Praseodymium(III) oxide (Pr2O3)
- Promethium(III) oxide (Pm2O3)
- Rhodium(III) oxide (Rh2O3)
- Samarium(III) oxide (Sm2O3)
- Scandium oxide (Sc2O3)
- Terbium(III) oxide (Tb2O3)
- Thallium(III) oxide (Tl2O3)
- Thulium(III) oxide (Tm2O3)
- Titanium(III) oxide (Ti2O3)
- Tungsten(III) oxide (W2O3)
- Vanadium(III) oxide (V2O3)
- Ytterbium(III) oxide (Yb2O3)
- Yttrium(III) oxide (Y2O3)
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+4 oxidation state | |
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+5 oxidation state | |
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+6 oxidation state | |
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+7 oxidation state | |
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+8 oxidation state | |
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Related | |
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