Abstract
THE transformation of quartz into cristobalite at temperatures higher than 1,470° C. has hitherto been accepted as a direct process. Recent measurements of the kinetics of this reaction (unpublished work) have, however, shown that the process is indirect and consists of two consecutive reactions in which a non-crystalline, disordered silica phase appears as an unstable intermediary between the quartz and the cristobalite.
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References
Gaskell, J. A., Grimshaw, R. W., and Roberts, A. L., 47th Report of the Joint Refractories Committee, 1955–56. Gas Council Publication, G.C.30.
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CHAKLADER, A., ROBERTS, A. Sintering of Quartz Crystal. Nature 183, 1252–1253 (1959). https://doi.org/10.1038/1831252a0
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DOI: https://doi.org/10.1038/1831252a0
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