Color centres and polymorphism in pure WO3 and mixed (1-x)WO3-y·xReO2 powders

E. Cazzanelli; G. Mariotto; C. Vinegoni; A. Kuzmin; J. Purans

doi:10.1007/BF02375997

Color centres and polymorphism in pure WO₃ and mixed (1-x)WO_3-y·xReO₂ powders

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

^*Corresponding author for this work

University of Calabria
University of Trento
University of Geneva

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The relationship between structural transformations and colour centres creation is discussed for deeply coloured hydrogen tungsten bronzes and for pure WO₃ 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·xReO₂, 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.

Original language	English
Pages (from-to)	335-344
Number of pages	10
Journal	Ionics
Volume	5
Issue number	5-6
DOIs	https://doi.org/10.1007/BF02375997
Publication status	Published - Sept 1999

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title = "Color centres and polymorphism in pure WO3 and mixed (1-x)WO3-y·xReO2 powders",

abstract = "The relationship between structural transformations and colour centres creation is discussed for deeply coloured hydrogen tungsten bronzes and for pure WO3 powders, acquiring less intense colour after mechanical treatments of variable duration. A comparative study on coloration is made also for mixed compounds (1-x)WO3-y·xReO2, 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.",

author = "E. Cazzanelli and G. Mariotto and C. Vinegoni and A. Kuzmin and J. Purans",

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AU - Cazzanelli, E.

AU - Mariotto, G.

AU - Vinegoni, C.

AU - Kuzmin, A.

AU - Purans, J.

PY - 1999/9

Y1 - 1999/9

N2 - The relationship between structural transformations and colour centres creation is discussed for deeply coloured hydrogen tungsten bronzes and for pure WO3 powders, acquiring less intense colour after mechanical treatments of variable duration. A comparative study on coloration is made also for mixed compounds (1-x)WO3-y·xReO2, 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.

AB - The relationship between structural transformations and colour centres creation is discussed for deeply coloured hydrogen tungsten bronzes and for pure WO3 powders, acquiring less intense colour after mechanical treatments of variable duration. A comparative study on coloration is made also for mixed compounds (1-x)WO3-y·xReO2, 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.

UR - https://www.scopus.com/pages/publications/4243963468

U2 - 10.1007/BF02375997

DO - 10.1007/BF02375997

M3 - Article

AN - SCOPUS:4243963468

SN - 0947-7047

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EP - 344

JO - Ionics

JF - Ionics

IS - 5-6

ER -

Color centres and polymorphism in pure WO₃ and mixed (1-x)WO_3-y·xReO₂ powders

Abstract

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