Bhat, Vasudeva ; Gopalakrishnan, J. (1986) HNbWO6 and HTaWO6: novel oxides related to ReO3 formed by ion exchange of rutile-type LiNbWO6 and LiTaWO6 Journal of Solid State Chemistry, 63 (2). pp. 278-283. ISSN 0022-4596
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Official URL: http://dx.doi.org/10.1016/0022-4596(86)90178-7
Related URL: http://dx.doi.org/10.1016/0022-4596(86)90178-7
Abstract
Both LiNbWO6 and LiTaWO6 undergo ion exchange in hot aqueous H2SO4 yielding the hydrates HMWO6 · H2O (M = Nb or Ta). The reaction is accompanied by a structural transformation from the rutile to the ReO3 structure. The cell constants are a = 3.783(3)Å for HNbWO6 · H2O and a = 3.785(5)Å for HTaWO6 . H2O. The ReO3 structure is retained by the dehydration products HMWO6 and MWO5.5 as well. HMWO6 phases yield H1+xMWO6 hydrogen bronzes on exposure to hydrogen in the presence of platinum catalyst.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 12444 |
| Deposited On: | 10 Nov 2010 06:35 |
| Last Modified: | 03 Jun 2011 05:54 |
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