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Powder X-Ray Data for Synthetic Anhydrous Sodium Zirconium Silicates

Published online by Cambridge University Press:  10 January 2013

G. Wilson and
F. P. Glasser
G. Wilson
Affiliation:
Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen, U.K. AB9 2UE.
F. P. Glasser
Affiliation:
Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen, U.K. AB9 2UE.
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Abstract

A systematic survey of phase formation in the Na2O-ZrO2-SiO2 system has revealed inconsistencies in the number and identity of ternary phases, and of their X-ray powder data. The phases Na2ZrSiO5, Na4Zr2Si3O12, Na2ZrSi2O7 and Na2ZrSi4O11 were prepared by solid-state reaction and their experimental X-ray diffraction patterns measured. Calculated X-ray diffraction patterns were generated by computer, using published crystallographic data, and critically compared with the experimentally observed values. The unit-cell constants were redefined to a greater accuracy than the presently accepted values published in the Powder Diffraction File. Only Na4Zr2Si3O12 produced an X-ray diffraction pattern which agreed with that previously published; those from the other phases were significantly different in both the intensities and positions of the reflections. Data for synthetic Na2ZrSi4O11 identical to the mineral vlasovite are reported.

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Type
Research Article
Information
Powder Diffraction , Volume 2 , Issue 3 , September 1987, pp. 176 - 179
Copyright
Copyright © Cambridge University Press 1987

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