A structural consideration of kanemite, octosilicate, magadiite and kenyaite

Abstract

By comparing data from²⁹Si, ¹H and ²³Na NMR studies, new model structures have been proposed for the layered sodium polysilicate hydrates, kanemite, octosilicate, magadiite and kenyaite. These are based on the known structures of the anhydrous silicate, KHSi₂O₅ , and piperazine silicate (EU19), rather than the known structure of the layered sodium polysilicate hydrate, makatite, which previous authors have used as a basis for their models.

References

1. G. J. Nesbitt, PhD Thesis, University of Durham, 1986.
2. W. Schwieger, K.-H. Bergk, D. Heidemann, G. Lagaly and K. Beneke, Z. Kristallogr., 1991, 197, 1; K. Beneke and G. Lagaly, Am. Mineral., 1977, 62, 763; R. K. Iler, J. Colloid Sci., 1964, 19, 648; R. A. Fletcher and D. M. Bibby, Clays Clay Miner., 1987, 35, 318; K. Beneke and G. Lagaly, Am. Mineral., 1983, 68, 818.
3. H. Annehed, L. Fälth and F. J. Lincoln, Z. Kristallogr., 1982, 159, 203.
4. W. Schwieger, D. Heidemann and K.-H. Bergk, Rev. Chim. Minér, 1985, 22, 639.
5. D. C. Apperley, M. J. Hudson, M. T. J. Keene and J. A. Knowles, J. Mater. Chem., 1995, 5, 577.
6. G. W. Brindley, Am. Mineral., 1969, 88, 1583.
7. T. Yanagisawa, K. Kuroda and C. Kato, React. Solids, 1988, 5, 167.
8. D. S. B. Hauck, Diplomarbeit, Heinrich-Heine Universität, Düsseldorf, 1993.
9. J. S. Dailey and T. J. Pinnavaia, J. Inclusion Phenom. Mol. Recognit. Chem., 1992, 13, 47.
10. D. Heidemann, Poster, Eleventh International Meeting on NMR Spectroscopy, Swansea, 1993.
11. G. G. Almond and R. K. Harris, unpublished work.
12. G. Lagaly, K. Beneke and A. Weiss, Am. Mineral., 1975, 60, 642; K. Beneke and G. Lagaly, Am. Mineral., 1983, 68, 818.
13. G. Scholzen, K. Beneke and G. Lagaly, Z. Anorg. Allg. Chem., 1991, 597, 183.
14. R. K. Harris and G. J. Nesbitt, J. Magn. Reson., 1988, 78, 245.
15. G. G. Almond, R. K. Harris, K. R. Franklin and P. Graham, J. Mater. Chem., 1996, 6, 843.
16. T. J. Pinnavaia, I. D. Johnson and M. Lipsicas, J. Solid State Chem., 1986, 63, 118.
17. A. Brandt, W. Schwieger and K.-H. Bergk, Rev. Chim. Minér., 1987, 24, 564; Crystal Res. Technol., 1988, 23, 1201; A. Brandt, W. Schwieger, K.-H. Bergk, P. Grabner and M. Porsch, Crystal Res. Technol., 1989, 24, 47.
18. G. G. Almond, R. K. Harris and P. Graham, J. Chem. Soc., Chem. Commun., 1994, 851.
19. A. J. Blake, K. R. Franklin and B. M. Lowe, J. Chem. Soc., Dalton Trans., 1988, 2513.
20. S. J. Andrews, M. Z. Papiz, R. McMeeking, A. J. Blake, K. R. Franklin, B. M. Lowe, J. R. Helliwell and M. M. Harding, Acta Crystallogr., Sect. B, 1988, 44, 73.
21. M. T. Le Bihan, A. Kalt and R. Wey, Bull. Soc. Fr. Minéral. Cristallogr., 1971, 94, 15.
22. Z. Q. Deng, J. F. Lambert and J. J. Fripiat, Chem. Mater., 1989, 1, 375.
23. W. Schweiger, K.-H. Bergk, D. Heidemann, G. Lagaly and K. Beneke, Z. Kristallogr., 1991, 197, 1.
24. J. V. Smith and C. S. Blackwell, Nature (London), 1983, 303, 223.
25. N. Janes and E. Oldfield, J. Am. Chem. Soc., 1985, 107, 6769.
26. J. P. Yesinowski, H. Eckert and G. R. Rossman, J. Am. Chem. Soc., 1988, 110, 1367.
27. H. Y. Eckert, J. Yesinowski, L. A. Silver and E. M. Stolper, J. Phys. Chem., 1988, 92, 2055.
28. G. G. Almond, R. K. Harris and K. R. Franklin, Solid State NMR, 1996, 6, 31.
29. M. J. Hudson, personal communication.
30. G. Engelhardt, P. Sieger and J. Felsche, Angew. Chem., Int. Ed. Engl., 1992, 9, 1210.