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A Study of $AlPO_4$ by $^{27}Al$ and $^{31}P$ MAS NMR $spectroscopy^+$

Prabakar, S and Rao, KJ and Rao, CNR (1991) A Study of $AlPO_4$ by $^{27}Al$ and $^{31}P$ MAS NMR $spectroscopy^+$. In: Materials Research Bulletin, 26 (8). pp. 805-812.

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Abstract

In order to understand the structure of aluminum phosphates, prepared by the sol-gel method, $^{27}Al$ and $^{31}P$ MAS NMR spectroscopy has been employed. The evolution of structure during the gel-glass-crystal transformation has been followed as a function of both temperature and compostion. Aluminum is octahedrally coordinated in the xerogel and on heating it is partially converted into tetrahedrally coordinated Al in the gel glass. Phosphorous is present in metaphosphate units. The structure of crystalline $AlPO_4$ is shown to consist of an ordered covalent network involving $[PO_{4/2}]^+$ and $[AlO_{4/2}]^−$ units.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Phosphates;Aluminum and phosphorous
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 06 Sep 2006
Last Modified: 19 Sep 2010 04:31
URI: http://eprints.iisc.ernet.in/id/eprint/8480

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