Names | |
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IUPAC name
Hexahydroxidotellurium
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Other names
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Identifiers | |
3D model (JSmol)
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ChEBI | |
ChemSpider | |
ECHA InfoCard | 100.029.334 |
PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
Te(OH)6 | |
Molar mass | 229.64 g·mol−1 |
Appearance | White monoclinic crystals |
Density | 3.07 g/cm3 |
Melting point | 136 °C (277 °F; 409 K) |
50.1 g/(100 ml) at 30 °C[1] | |
Acidity (pKa) | 7.5, 11, 14[2] |
Conjugate base | Tellurate |
Structure | |
octahedral | |
0 D | |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards
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corrosive |
Related compounds | |
Other anions
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Hydrotelluric acid Tellurous acid Hydrogen telluride |
Related compounds
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Teflic acid Sulfuric acid Selenic acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Telluric acid, or more accurately orthotelluric acid, is a chemical compound with the formula Te(OH)6, often written as H6TeO6. It is a white crystalline solid made up of octahedral Te(OH)6 molecules which persist in aqueous solution.[3] In the solid state, there are two forms, rhombohedral and monoclinic, and both contain octahedral Te(OH)6 molecules,[4] containing one hexavalent tellurium (Te) atom in the +6 oxidation state, attached to six hydroxyl (–OH) groups, thus, it can be called tellurium(VI) hydroxide. Telluric acid is a weak acid which is dibasic, forming tellurate salts with strong bases and hydrogen tellurate salts with weaker bases or upon hydrolysis of tellurates in water.[4][5] It is used as tellurium-source in the synthesis of oxidation catalysts.