One method involves fitting individual line profiles, finding the
area of
the crystalline peaks, and the total area of the pattern. The ratio
is an estimate of the
percent crystallinity. When you have fully crystalline material as
an option, you can
also account for differences in scattering from crystalline and
amorphous material.
One reference is: Fix, I. and K.J. Steffens Drug Development and
Industrial Pharmacy.
v30. no 5. 513-523 2004.
Also, Klug and Alexander. X-ray diffraction procedures for
polycrystalline and amorphous materials. Wiley. 1954
David Lee, Ph.D.
SMRL, The Ohio State University
Dept. of Materials Science and Engineering
2041 College Rd
Columbus, OH 43210
(614)-688-3182
On Feb 2, 2008, at 6:09 AM, Lubomir Smrcok wrote:
Hello,
I was asked by my colleague if there is a way how to find (I'd
prefer estimate) the amount of the crystalline phase in the glass
"matrix". Both phases have the same (or very close) chemical
composition.
If necessary, they can also prepare the sample totaly crystalline
without any glass.
My apologies for sending this problem to "rietveld" list, but I
hardly know any better address :-)
To be frank : I do not expect to solve the problem using "Rietveld"
as the structure of the crystalline phase is not very well known.
They would prefer a relatively simple method for daily use in their
lab.
Thanks on behalf of them.
Lubo
