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Epitaxy in the Crystallization of Feldspar Gels and Glasses

Published online by Cambridge University Press:  21 February 2011

Chunling Liu ,
Sridhar Komarneni  and
Rustum Roy
Chunling Liu
Affiliation:
Intercollege Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
Sridhar Komarneni
Affiliation:
Also with the Department of Agronomy
Rustum Roy
Affiliation:
Intercollege Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802
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Abstract

The crystallization behaviors of stoichiometric feldspar gels and glasses before and after seeding have been compared, and the role of epitaxy in their crystallization upon seeding has been studied. The crystallization products were mainly determined by X-ray diffraction (XRD) analysis and epitaxy upon seeding was examined with a scanning electron microscope (SEM), and energy dispersive spectrometry (EDS). It was found that upon isostructural seeding, Na-and K-feldspars crystallized epitaxially from their gels and/or glasses. Little or no seeding effect was found in CaAl2Si2O8 and SrAl2Si2O8 gels and glasses. Isostructural seeding in BaAl2Si2O8 gels increased the formation of Ba-feldspar (monoclinic celsian) epitaxially, whereas without seeding hexacelsian was the crystallization product.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 721
Copyright
Copyright © Materials Research Society 1998

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References

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