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The Physicochemical Properties Of Vpi-7: A Microporous Zincosilicate With Three-Membered Rings

Published online by Cambridge University Press:  15 February 2011

Michael J. Annen ,
Mark E. Davis ,
John B. Higgins  and
John L. Schlenker
Michael J. Annen
Affiliation:
Virginia Polytechnic Institute, Blacksburg, VA Current address:California Institute of Technology, Pasadena, CA
Mark E. Davis
Affiliation:
Virginia Polytechnic Institute, Blacksburg, VA Current address:California Institute of Technology, Pasadena, CA
John B. Higgins
Affiliation:
Mobil Research and Development Corporation, Princeton, NJ
John L. Schlenker
Affiliation:
Mobil Research and Development Corporation, Princeton, NJ
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Abstract

The synthesis of materials with void volumes in excess of 50% is an ongoing challenge in molecular sieve science. It has been shown that a correlation exists between the minimum framework density (FD) and the smallest ring in which all tetrahedral atoms reside (MINR). Based on this evidence it appears that materials containing 3-membered rings (3MR) will be necessary in order to obtain FDs lower than those currently attainable. Several framework beryllosilicate minerals including the natural zeolite, lovdarite, contain 3MRs. Unfortunately, beryllium can form highly toxic compounds that limit its suitability for many applications. Thus, in this study we have searched for a replacement for Be and have found that zinc is a suitable substitute with respect to the formation of three-membered rings.

We report here VPI-7, a novel zincosilicate molecular sieve which contains three-membered rings. The VPI-7 framework contains rings composed of 3–, 4– and 5 T-atoms which form unidimensional 8– and intersecting 9MR channels.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 233: Symposium U – Synthesis/Characterization and Novel Applications of Molecular Sieve Materials , 1991 , 245
Copyright
Copyright © Materials Research Society 1991

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References

REFERENCES

1. Meier, W.M. and Olson, D.H., Atlas of Zeolite Structure Types, (Butterworths, Boston, 1987), p. 84.Google Scholar
2. Brunner, G.O. and Meier, W.M., Nature 337, 146 (1989).Google Scholar
3. Stixrude, L. and Bukowinski, M.S.T., Am. Mineral. 75, 1159 (1990).Google Scholar
4. Stixrude, L. and Bukowinski, M.S.T., Science 226, 1071 (1990).Google Scholar
5. Merlino, S., in Proceedings of the Sixth International Zeolite Conference, edited by Olson, D.H. and Bisio, A. (Butterworths, Boston, 1984).Google Scholar
6. Merlino, S., Eur. J. Mineral. 2(6), 809 (1990).CrossRefGoogle Scholar
7. Ueda, S., Koizumi, M., Baerlocher, Ch., McCusker, L.B. and Meier, W.M., 7th IZC, Tokyo, Poster Paper 3C-3 (1986).Google Scholar
8. Lawton, S. L. and Rohrbaugh, W.J., Science 247, 1319 (1990).Google Scholar
9. Geisinger, K.L., Gibbs, G.V. and Navrotsky, A., Phys. Chem. Miner. 11, 266 (1985).Google Scholar
10. Kohara, S. and Kawahara, A., Acta Cryst. C46, 1373 (1990).Google Scholar
11. Data collected at X7A beam line, National Synchrotron Light Source, Brookhaven National Laboratory. We would like to acknowledge Dr. D.E. Cox for assistance with data collection.Google Scholar
12. Ch. Baerlocher, Hepp, A. and Meier, W.M., Progara DLS-76 (Eidgenossische Technische Hochschule, Zurich, revised March 1978).Google Scholar
13. Baur, W.H., Kassner, D., Kim, C. and Sieber, N.H.W., Eur. J. Mineral. 2(6), 761 (1990).Google Scholar
14. Anderson, E.K., Anderson, I.G. and Sorensen, G.P., Eur. J. Mineral. 2(6), 799 (1990).Google Scholar
15. Perchar, F., Cryst. Res. Technol. 23, 647 (1988).Google Scholar
16. Pauling, L., Proc. Nat Acad. Sciences 16, 453 (1930)CrossRefGoogle Scholar
17. Meier, W.M., Z. Krist. 113,430 (1960).CrossRefGoogle Scholar
18. Baerlocher, Ch. and Barrer, R.M., Z. Krist. 140, 10 (1974).Google Scholar
19. Breck, D.W., Zeolite Molecular Sieves, (Wiley, New York, 1974),Google Scholar