Thermal phase transitions in antimony (III) oxides
Orman, R. G. and Holland, D.. (2007) Thermal phase transitions in antimony (III) oxides. Journal of Solid State Chemistry, Vol.180 (No.9). pp. 2587-2596. ISSN 0022-4596Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/j.jssc.2007.07.004
Previous reports of the thermal behaviour of antimony trioxide show significant disagreement on the values for the temperatures associated with specific thermal events. In this reappraisal, samples of both polymorphs of Sb2O3 (senarmontite and valentinite) have been analysed using X-ray diffraction and simultaneous differential thermal/thermogravimetric analysis techniques. The senarrnontite-valentinite phase transition has been observed to occur as a multi-stage event commencing at temperatures as low as 615 +/- 3 degrees C evidence of oxidation to Sb2O4 under inert atmosphere may indicate that the depression is related to surface- or bulk-bound water. Valentinite produced by mechanical milling of senarmontite exhibits the reverse phase transition to senarmontite at a lower than normal temperature (445 +/- 3 degrees C). Oxidation temperatures of 531 +/- 4 degrees C for senarmontite and 410 +/- 3 degrees C for mechanically derived valentinite were also recorded. (c) 2007 Elsevier Inc. All rights reserved.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Journal of Solid State Chemistry|
|Official Date:||September 2007|
|Number of Pages:||10|
|Page Range:||pp. 2587-2596|
|Access rights to Published version:||Restricted or Subscription Access|
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