Re: [sdpd] Percentage crystallinity calculation using Powder XRD

[bixam manthri <mantri_21...@yahoo.com>]

Dear Sir,

Thanks for your reply,
 
Is there any method for the same without using any Internal reference standerd.
 
Without establishing a calibration curve can we simply calculate the percentage of cystallinity in a sample, having the diffractogram.
 
 Physically can we do this??: calculating  the Area of each individual peaks seperately and the net area of the total diffractogram.
 
%crystallinity= 100* sum of area of each individual peak/ Net area of the Diffractogram.
 
%crystallinity= 100* C/ A+C
 where   C= net area of crystaline peaks
             A+C= Net area Of the Diffractogram.
 
Please confirm me how far this method is accepted.
 
Thanking you
Best Regards
Manthri.
 
  
 
 
 
  
Armel Le Bail <alb...@cristal.org> wrote:

>Iam an working on the percentage of crystallinity calculation using the 
>powder XRD pattern. Could any one can give me some documentation or the 
>reference information.

If you do not have access to the Web of Knowledge nor
direct access to other commercial systems, then try
the new Scholar Google search engine :

135 references obtained by a search with keywords
"crystallinity percentage X-ray":
http://scholar.google.com/scholar?hl=en&lr=&q=crystallinity+percentage+X-ray&btnG=Search

Anyway, I am afraid that this kind of estimation needs
for a calibration curve established from well known mixtures
of crystalline and amorphous phases.

And the question is : is there really a clear separation between
these two parts when the crystalline part becomes highly
defective ? So, be prudent with your results...

Best wishes,
Armel

PS - Other search for references possible at :
INGENTA: http://www.ingentaconnect.com/
INIST : http://www.inist.fr/


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