Hi Scott,
I believe we had a conversation about this last January.
XAFS is not sensitive to the crystallographic lattice constants. It
measures the spacing between atoms. Because of thermal vibrations and
other disorder terms, the average distance between atoms is larger
than the distance
A correction to Matt's email:
In random alloys, smaller size atoms and larger size atoms are at different
average distances (measured by EXAFS and other local-structure-sensitive
techniques, e.g., XRD/PDF) that are, respectively, smaller and larger than the
distance between the average lattice
Thanks, Matt--you give a complete and satisfying discussion of this on
January 23 on this list. I forgot about that because it came at the
tail end of a long discussion as to whether C3 could ever be 0, but I
suspect what you said then was rattling around in the back of my head
and only
