Re: space group of NaxCoO2

[pstephens]

You should start with the paper by J.D. Jorgensen et al., Phys. Rev. B 68, 214517 (2003).  I don't have that paper in front of me, and so I don't know if it completely addresses the space group issue of both phases, but it will get you in touch with the recent literature.

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Peter W. Stephens, Professor
Department of Physics & Astronomy
State University of New York
Stony Brook, NY 11794-3800