Re: space group of NaxCoO2

[pstephens]

I just recalled a more directly relevant paper for your question: M.L. Foo et al., Phys. Rev. Letters 92, 247001 (2004), published about six weeks ago.  That paper is much more about electronic properties through the phase diagram as a function of x, but it will help get you oriented, and has some electron diffraction results, and pointers to other recent literature.  There is also a nice discussion of the issues involved, perhaps a bit more readable than the PRL, by Ong and Cava in the July 2, 2004 issue of Science, page 52.

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