Abstract
MUCH attention has been paid to the process of formation of mullite, a refractory mineral of the composition 3Al2O3.2SiO2, through decomposition of Al–Si clay minerals and crystallization of amorphous gels. In the course of my work on allophanes and related minerals1, a new tetragonal phase was encountered by heating the co-precipitated Al2O3–SiO2 gels at the temperature-range 910°–l,100° C.
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References
Ossaka, J., Advances in Clay Science, Proc. Second Ann. Meeting on Clay and Clay Minerals, 337 (1960).
Demeduk, T., and Cole, W. F., Nature, 181, 1400 (1958).
Scholze, H., Ber. D.K.G., 32, 381 (1955).
Agrell, S. O., and Smith, J. V., J. Amer. Ceramic Soc., 43, 69 (1960).
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OSSAKA, J. Tetragonal Mullite-like Phase from Co-precipitated Gels. Nature 191, 1000–1001 (1961). https://doi.org/10.1038/1911000a0
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DOI: https://doi.org/10.1038/1911000a0
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