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・ Telmatochromis dhonti
・ Telmatochromis temporalis
・ Telmatochromis vittatus
・ Telmatogeton
・ Telluride, Nevada
・ Tellurion
・ Tellurite
・ Tellurite (disambiguation)
・ Tellurite (ion)
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・ Tellurium
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Tellurium dioxide
・ Tellurium fluoride
・ Tellurium hexafluoride
・ Tellurium iodide
・ Tellurium monoxide
・ Tellurium oxide
・ Tellurium tetrabromide
・ Tellurium tetrachloride
・ Tellurium tetrafluoride
・ Tellurium tetraiodide
・ Tellurium trioxide
・ Tellurobismuthite
・ Tellurol
・ Tellurometer
・ Tellurous acid


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Tellurium dioxide : ウィキペディア英語版
Tellurium dioxide

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Tellurium dioxide (TeO2) is a solid oxide of tellurium. It is encountered in two different forms, the yellow orthorhombic mineral tellurite, β-TeO2, and the synthetic, colourless tetragonal (paratellurite), α-TeO2. Most of the information regarding reaction chemistry has been obtained in studies involving paratellurite, α-TeO2.〔W.R.McWhinnie (1995) ''Tellurium - Inorganic chemistry'' Encyclopedia of Inorganic Chemistry Ed. R. Bruce King (1994) John Wiley & Sons ISBN 978-0-471-93620-6〕
==Preparation==
Paratellurite, α-TeO2, is produced by reacting tellurium with O2:〔
:Te + O2 → TeO2
An alternative preparation is to dehydrate tellurous acid, H2TeO3, or to thermally decompose basic tellurium nitrate,Te2O4.HNO3 above 400 °C.〔

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