Re: Combined neutron/x-ray refinements

[Alan Hewat, ILL Grenoble]

>The neutron fit will be
>completely insensitive to the V positions and the x-rays insensitive to
>the D positions. (This is easily verified.) 

Before some-one else says they can see hydrogen with x-rays, Mike
Glazer, Bill David and I saw vanadium with neutrons. So let's just 
say "insensitive" but not "completely". Otherwise I agree :-) 
Combined refinements are sometimes necessary and a good thing.

1. David, W. I. F., Glazer, A. M. and Hewat, A. W. (1979) Phase Transitions  1, 155-69.
The structure and ferroelastic phase transition of bismuth vanadate (BiVO4).

 And its not even in ICSD :-(

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/