Claudio Vinegoni, Ph.D. | Color Centres and Polymorphism in Pure WO(3) and Mixed (1-x)WO(3-y)center dot xReO(2) Powders

Ionics
Color Centres and Polymorphism in Pure WO(3) and Mixed (1-x)WO(3-y)center dot xReO(2) Powders

Cazzanelli^#, E., Mariotto, G., Vinegoni, C., Kuzmin, A., and Purans, J.

Ionics 1999

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The relationship between structural transformations and colour centres creation is discussed for deeply coloured hydrogen tungsten bronzes and for pure WO(3) powders, acquiring less intense colour after mechanical treatments of variable duration. A comparative study on coloration is made also for mixed compounds (1-x)WO(3-y)center dot xReO(2), where an evidence of a resonance effect for a particular Raman band at 970 cm(-1), attributed to the color centres, is observed. Besides, it is found that even moderate milling treatments result in a quite different structural evolution of tungsten trioxide upon cooling.
@article{1999-INCS, author= {Cazzanelli<sup>#</sup>, E. and Mariotto, G. and Vinegoni, C. and Kuzmin, A. and Purans, J.}, title= {Color Centres and Polymorphism in Pure WO(3) and Mixed (1-x)WO(3-y)center dot xReO(2) Powders}, journal= {Ionics}, alternatejournal = {Ionics}, year = {1999}, volume = {5}, number = {5-6}, pages = {335-344}, issn = {0947-7047}, doi = {10.1007/bf02375997}, }
10.1007/bf02375997

Abstract

"The relationship between structural transformations and colour centres creation is discussed for deeply coloured hydrogen tungsten bronzes and for pure WO(3) powders, acquiring less intense colour after mechanical treatments of variable duration. A comparative study on coloration is made also for mixed compounds (1-x)WO(3-y)center dot xReO(2), where an evidence of a resonance effect for a particular Raman band at 970 cm(-1), attributed to the color centres, is observed. Besides, it is found that even moderate milling treatments result in a quite different structural evolution of tungsten trioxide upon cooling."

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For attribution in academic contexts, please cite this work as:

Cazzanelli^#, E., Mariotto, G., Vinegoni, C., Kuzmin, A., & Purans, J. (1999). Color Centres and Polymorphism in Pure WO(3) and Mixed (1-x)WO(3-y)center dot xReO(2) Powders. Ionics, 5(5-6), 335–344. https://doi.org/10.1007/bf02375997