Abstract
A structural study of a potassium-substituted cordierite with K0.5Mg2Al4.5Si4.5O18 formula was performed between 20 and 825° C using a time-of-flight powder neutron diffraction technique, on sintered samples obtained by glass crystallization. The thermal evolution of this compound is essentially of the same nature as for pure hexagonal cordierite, but is very dependent on the presence of potassium atoms within the channels. The very low value of the thermal expansion coefficient (\(\bar \alpha = 0.4 x 10^{ - 6} K^{ - 1} \) between 20 and 825° C) results from an opposite evolution of thea andc lattice parameters which may be explained in terms of a reorganization and a regularization of (Al, Si)O4 and MgO6 polyhedra. It strongly depends on the Al/Si ordering degree.
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References
R. Morrel,Proc. Br. Ceram. Soc. 28 (1979) 53.
D. L. Evans, G. R. Fisher, J. E. Geiger andF. W. Martin,J. Amer. Ceram. Soc. 63 (1980) 629.
B. H. Mussler andM. W. Shafer,Amer. Ceram. Soc. Bull. 63 (1984) 705.
G. V. Gibbs,Amer. Mineral. 51 (1966) 1069.
E. P. Maegher andG. V. Gibbs,Can. Mineral. 15 (1977) 43.
J. P. Cohen, F. K. Ross andG. V. Gibbs,Amer. Mineral. 62 (1977) 67.
M. F. Hochella Jr, G. G. Brown Jr, F. K. Ross andG. V. Gibbs,ibid. 64 (1979) 337.
J. H. Wallace andH. R. Wenk,ibid. 65 (1980) 96.
P. Predecki, J. Haas, J. Faber Jr andR. L. Hitterman,J. Amer. Ceram. Soc. 70 (1987) 175.
M. E. Milberg andH. D. Blair,ibid. 60 (1977) 372.
J. D. Lee andJ. L. Pentecost,ibid. 59 (1976) 183.
H. Ikawa, T. Otagiri, O. Imai, M. Suzuki, K. Urabe andS. Udagawa,J. Amer. Ceram. Soc. 69 (1986) 492.
P. Predecki, J. Haas, J. Faber Jr andR. L. Hitterman,Adv. X-ray Anal. 29 (1986) 173.
Y. H. Kim, D. Mercurio, J. P. Mercurio andB. Frit,Mater. Res. Bull. 19 (1984) 209.
Y. H. Kim, J. P. Mercurio andC. Gault,Ceram. Int. 11 (1985) 27.
J. P. Mercurio, D. Mercurio, B. Frit, Y. H. Kim andG. Roult, High Tech Ceramics, Material Science Monographs, 38 (Elsevier Science, Amsterdam, 1987) p. 361.
J. Haas, P. Predecki, J. Faber Jr andR. L. Hitterman,Adv. X-ray Anal. 29 (1986) 395.
G. Roult andJ. L. Buevoz,Rev. Phys. Appl. 12 (1977) 581.
H. M. Rietveld,J. Appl. Crystallogr. 2 (1969) 65.
R. M. Hazen andL. W. Finger, “Comparative Crystal Chemistry” (Wiley, New York, 1982) p. 86.
K. Robinson, G. V. Gibbs andP. H. Ribbe,Science 172 (1971) 567.
C. A. Fyfe, G. C. Gobbi andA. Putnis,J. Amer. Chem. Soc. 108 (1986) 3218.
A. Putnis, E. Salje, S. A. T. Redfern, C. A. Fyfe andH. Strobl,Phys. Chem. Minerals 14 (1987) 446.
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Mercurio, D., Thomas, P., Mercurio, J.P. et al. Powder neutron diffraction study of the thermal expansion of a K-substituted cordierite. J Mater Sci 24, 3976–3983 (1989). https://doi.org/10.1007/BF01168960
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DOI: https://doi.org/10.1007/BF01168960