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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.

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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