Polymorphism of silica |
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| Authors: | S J Stevens R J Hand J H Sharp |
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| Affiliation: | (1) Department of Engineering Materials, University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD, UK |
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| Abstract: | A study of the stability relations of pure silica phases is described. It is shown that although cristobalite can be produced
from pure quartz by heating it is not possible to produce tridymite in this fashion; a flux or mineralizer is required for
tridymite formation and even in this case cristobalite is produced before any tridymite is observed. Thus it is concluded
that the stability relations for the silica minerals proposed by Fenner are incorrect and that tridymite is not a stable phase
in the pure silica system.
This revised version was published online in November 2006 with corrections to the Cover Date. |
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