Perhaps I missed a followup to this during my absence, but if you don't find
the exact structure in ICSD, try looking for an isomorph eg in the case of
Cs2SiO3 you will find 9 possible isomorphs including Na2SiO3 if you search 
for compounds with ANX formula AB2X3 containing Si1 and O3.

Let me know if you need details.  Alan H.

Tao <[EMAIL PROTECTED]> wrote 31 Oct 1998:
>I could only find the structure parameters for Cs2Si2O5 in our reasonably
>updated ICSD database. I wonder if there are any published structure data
>out there. Good luck.
>
>On Fri, 30 Oct 1998, Hongwu Xu wrote:
>>      Does anyone have structural information (space group, cell
>> parameters, atomic positions) of Cs2SiO3? The thermodynamic data for this
>> compound are available but I couldn't find any crystallographic info..

Alan Hewat, ILL Grenoble, FRANCE <[EMAIL PROTECTED]> tel (33) 4.76.20.72.13 
ftp://ftp.ill.fr/pub/dif  fax (33) 4.76.48.39.06  http://www.ill.fr/dif/

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