Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-27T02:18:23.656Z Has data issue: false hasContentIssue false
  • English
  • Français

Formal Charge Model for Predicting Structures, Acid-Base, and Ion Exchange Properties of Mixed Oxides

Published online by Cambridge University Press:  10 February 2011

B. C. Bunker
B. C. Bunker*
Affiliation:
Pacific Northwest Laboratory, Richland, WA, 99352, [email protected]
Get access

Abstract

The range of mixed-oxide materials used in ion exchange and catalytic materials is rapidly expanding from aluminosilicates such as zeolites and clays into materials whose structure and chemical properties are more difficult to predict and understand. A simple model based on local charge has been developed to predict distributions of local bonding configurations of both cations and anions in mixed oxides. The model, illustrated for the case of silicotitanates, provides qualitative predictions regarding both the acid-base and ion exchange properties of such materials as a function of composition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 432: Symposium S – Aqueous Chemistry and Geochemistry of Oxides , 1996 , 21
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Pauling, L., The Nature of the Chemical Bond, 3d ed., Cornell University Press, Ithaca, NY, 1960.Google Scholar
2. Brown, I. D. and Shannon, R. D., Acta Cryst.,A29, 266 (1973).Google Scholar
3. Speer, J. A. and Gibbs, G. V., Am. Miner., 61, 238 (1976).Google Scholar
4. Baes, C. F. and Mesmer, R. E., The Hydrolysis of Cations, John Wiley and Sons, New York, 1976.Google Scholar
5. Bunker, B. C. and Balmer, M. L., “Predicting Structures and Properties of Silicotitanate Materials,” submitted J. Mater. Res.Google Scholar
6. Iler, R. K., The Chemistry of Silica, John Wiley and Sons, New York, 1979.Google Scholar
7. Dosch, R. G., Stephens, H. P., Stohl, F. V., Bunker, B. C., and Peden, C. H. F., “Hydrous Metal Oxide-Supported Catalysts: Part 1. Preparation Chemistry and Physical and Chemical Properties, Sandia National Laboratories, SAND89-2399, February, 1990.Google Scholar
8. Bray, L. A., Carson, K. J., and Elovich, R. J., “Initial Evaluation of Sandia National Laboratory-Prepared Crystalline Silico-Titanates for Cesium Recovery,”; Pacific Northwest Laboratory, PNL-8847/UC-510, October 1993.Google Scholar