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A synchrotron X-ray powder diffraction study of CoAl2O4 and CoGa2O4 by PSD diffractometer technique

Published online by Cambridge University Press:  10 January 2013

A. Nørlund Christensen ,
P. Norby  and
J. C. Hanson
A. Nørlund Christensen*
Affiliation:
Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
P. Norby
Affiliation:
Department of Chemistry, Odense University, DK-5230 Odense M, Denmark
J. C. Hanson
Affiliation:
Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, U.S.A.
*
a)To whom correspondence should be addressed.
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Abstract

X-ray powder diffraction data for the spinels CoAl2O4 and CoGa2O4 were measured with synchrotron radiation using λ = 1.2033 Å, determined with Si as a standard (a = 5.4305 Å). The two blue compounds prepared hydrothermally are cubic with space group Fd3m. Profile refinements gave the results: CoAl2O4 had a = 8.0968(1) Å and composition (Co0.71Al0.29]Al1.71Co0.29]O4 and CoGa2O4 had a = 8.3229(1) Å and composition Ga[CoGa]O4. The degree of inversion is thus 0.29 for CoAl2O4 and one for CoGa2O4.

Keywords

synchrotron radiationCPS 120 detectoroxide spinelsdegree of inversion
Type
Research Article
Information
Powder Diffraction , Volume 10 , Issue 3 , September 1995 , pp. 185 - 188
Copyright
Copyright © Cambridge University Press 1995

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Footnotes

b)Present address: Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, U.S.A.

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