Nonstoichiometry in sillimanite: Mullite compositions with sillimanite-type superstructures |
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| Authors: | W E Cameron |
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| Institution: | 1. Department of Mineralogy and Petrology, University of Cambridge, CB2 3EW, Cambridge, England
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| Abstract: | Complete solid solution between sillimanite and mullite is shown to occur when Fe3+, in the virtual absence of Ti, replaces AlVI. All members of the series adopt the sillimanite (Al, Si)IV ordering scheme in preference to the modulated structure typical of synthetic and titaniferous natural mullites. |
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