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X-ray diffraction analysis of (Na0.6H0.4)(Ta0.7Nb0.3)O3

Published online by Cambridge University Press:  10 January 2013

Raj P. Singh ,
Michael J. Miller  and
Jeffrey N. Dann
Raj P. Singh*
Affiliation:
Research and Development Division, Chemical and Metallurgical Products, OSRAM SYLVANIA Products, Inc., Hawes Street, Towanda, Pennsylvania 18848-0504
Michael J. Miller
Affiliation:
Research and Development Division, Chemical and Metallurgical Products, OSRAM SYLVANIA Products, Inc., Hawes Street, Towanda, Pennsylvania 18848-0504
Jeffrey N. Dann
Affiliation:
Research and Development Division, Chemical and Metallurgical Products, OSRAM SYLVANIA Products, Inc., Hawes Street, Towanda, Pennsylvania 18848-0504
*
a)Author to whom all correspondence should be addressed. E-mail address: singh@osi.sylvania.com
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Abstract

(Na0.6H0.4)(Ta0.7Nb0.3)O3 was synthesized by heating a tantalum/niobium scale containing two sodium tantalate/niobate phases :Na14(Ta0.7Nb0.3)12O37·31H2O and NaH2Ta0.7Nb0.3O4. Powder X-ray diffraction data for (Na0.6H0.4)(Ta0.7Nb0.3)O3 indicated it to be a cubic perovskite (ABO3/ReO3 type structure) with unit cell a0=3.894 Å. The compound is analogous to the mineral lueshite (NaNbO3), and to the high temperature forms of NaTaO3 and NaNbO3. Powder diffraction data for (Na0.6H0.4)(Ta0.7Nb0.3)O3 will be useful in the analysis of synthetic tantalum/niobium concentrates.

Keywords

(Na0.6H0.4)(Ta0.7Nb0.3)O3,powder datatantalum/niobium synthetic concentrates

Information

Type
Research Article
Information
Powder Diffraction , Volume 14 , Issue 3 , September 1999 , pp. 231 - 233
Copyright
Copyright © Cambridge University Press 1999

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References

Singh, R. P., and Miller, M. J. (1997). “Speciation of titanium in tungsten carbide scrap before, during and after its processing for tungsten and cobalt recovery,” in Proceedings of Symposium on Titanium Extraction and Processing, edited by B. Mishra and G. J. Kipouros (The Minerals, Metals & Materials Society, Warrendale, PA), pp. 31–43.Google Scholar