At 14:12 22/05/2000, you wrote:
I'm working on PFN ferroelectric ceramics. I need to know the atomic
positions of the coumpond of Fe(NbO3)2, SG: Pbcn (60). It has the
columbite structure.

Form ICSD-for-WWW:
Bordet,P. McHale,A. Santoro,A. Roth,RS. (1986) J.Solid State Chem 64 30-46
Powder neutron diffraction study of Zr Ti O4, Zr5 Ti7 O24 and Fe Nb2 O6

N *-FeNb2O6-Bordet P, McHale A, Santoro A, Roth R S
C 14.2661 5.7334 5.0495 90 90 90
S GRUP P B C N
A Fe1    0.00000 0.33110 0.25000 0.35000 1.00000
A Nb1    0.33890 0.31910 0.25060 0.48000 1.00000
A O1     0.09630 0.10410 0.07270 0.51000 1.00000
A O2     0.41890 0.11630 0.09900 0.65000 1.00000
A O3     0.75600 0.12360 0.07930 0.43000 1.00000

Alan Hewat, ILL Grenoble, FRANCE <[EMAIL PROTECTED]> tel (33) 4.76.20.72.13
ftp://ftp.ill.fr/pub/dif  fax (33) 4.76.20.76.48  http://www.ill.fr/dif/

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