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Journal of the Brazilian Chemical Society

Print version ISSN 0103-5053On-line version ISSN 1678-4790


ROSSETO, Renato; SANTOS, Ádamo C. M. A. dos  and  GALEMBECK, Fernando. Hydrous non-crystalline phosphates: structure, function and a new white pigment. J. Braz. Chem. Soc. [online]. 2006, vol.17, n.8, pp.1465-1472. ISSN 0103-5053.

Hydrated non-crystalline inorganic solids are often neglected due to the limited comprehension of their complex physico-chemical and structural properties. However, these non-crystalline materials exhibit a rich and varied chemistry, interesting for scientific and technological reasons. This work reviews general aspects of formation of hydrated non-crystalline solids, with special emphasis on aluminum (poly)phosphate materials. Precursors and concentration variations, temperature, ageing and reaction pH are trivial synthetic variables, but they promote the formation of a myriad of compounds adequate for many functions. Amorphous aluminum phosphates are widely employed in different industrial applications, providing good examples of the potential of hydrous amorphous solids.

Keywords : non-crystalline solids; ionic solids; aluminum phosphate; amorphous polyphosphate.

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