Quantitative Degree of Crystallinity of a Powder Sample

[ZirSil]

Hi,

I am new to this forum and a novice with XRD data analysis.

I have created some powder samples with known amounts of amorphous silica that contain varying degrees of crystalline material (cristobalite) at 0,20,40,60,80,100% intervals.
The XRD spectra are as expected with a varying degree of an amorphous background, with the crystalline peaks prominating. I have read that it is possible to calculate from the spectra the degree of cystallinity by calculating the ratio of the intergrated peaks to the integrated total area.

Is this still the best method to use, and also how would I best go about doing this. I have Match! data analysis software currently, but cannot figure out how it is done with this software.

Any suggestions would be greatly appreciated


Kind Regards

Ben

[johnewarren]

Hi Ben

Obvious but silly question what software do you have at hand to process the data? Have you managed to index and refine your Cristobalite cell ok?

There is this program BGMN which says it can do that kind of analysis automatically.

J

PS

Silly point don't take it the wrong way call them patterns, graphs, plots but not "XRD spectra"

[ZirSil]

Thanks for the heads up

I have Match! analysis software with PDF 2, which will 'search-match' the cristobalite peaks fines on the 100% and 80% cristobalite powders. This falls down for the other powders coming up with a load of weird organics, but all of the peaks overlap as they would be expected to. Currently all I have is the Match! software and X'pert data viewer, hence my need for your help. I was lead to believe that match! could de-convolute the peaks from the amorphous noisy background quantitatively but haven't figure out how yet.

I will try the software you have mentioned and let you know how I get on.

Thanks for the support

Ben

[ZirSil]

The software on the link you have gave me has only one download link for a demo, which says it has expired prior to install. I have emailed them to see what can be done to resolve this.

Is what I am trying to do unusual, I would have thought it would be a common measurement. I have read papers where they have made a calibration curve from the integrated peak area of the most prominent peak vs % amorphous material. Does this sound familiar?

Thanks Again

Ben