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Re:RE: [sdpd] Assistance
Or RTFM ...
On Thu, 22 Sep 2011, wrote:
>> They are about 100 nanometer?
> in general, XRD can determine the crystal size in the range of 1nm-100nm. So you should check your data carefully under TEM or SEM, if possible.
>
> There are several method to determine crystal size by XRD tech., The Scherrer Equation, W-H, Fourier, and Rietveld. (see published journal - crystal size determination round robin)
>
> Generally, two mehods W-H and Rietveld can be used in most software.
>
>> How to preceed data in specific software?
> Maybe you should check the help file or E-mail Panalytical application expert.
>
> Best,
> Xu Jun
>
>
>
> At 2011-09-22 13:01:29,JB <javaedot2...@yahoo.com> wrote:
>
>
> Thanks Wang, the particles are Calcite, probably rhombohedral, they are about 100 nanometer, but I needed to know how to proceed with X'pert HighScore Plus to determine the particle size after I have got the XR diffraction patterns.
>
> Thanks in anticipation
>
> Make the world a better place to live in
>
> --- On Wed, 9/21/11, Xiaodong Wang <iangie...@126.com> wrote:
>
> From: Xiaodong Wang <iangie...@126.com>
> Subject: RE: [sdpd] Assistance
> To:sdpd...@yahoogroups.com
> Date: Wednesday, September 21, 2011, 8:39 AM
>
>
>
> Is your particle calcite?
>
> Have you checked SEM images of these powder to see the extend of platy shape?
>
> Just be careful about the preferred orientation effect when using Bragg-Brentano geometry.
>
> If not, then you can use peak FWHM to estimate the coherent scatter dimension.
>
> Yours Sincerely
>
> -------------------
>
> Xiaodong (Tony) Wang
>
> Department of Imaging and Applied Physics
>
> Curtin University
>
> From:sentto-1052548-2737-1316617777-iangie=126.com...@returns.groups.yahoo.com [mailto:sentto-1052548-2737-1316617777-iangie=126.com...@returns.groups.yahoo.com] On Behalf Of JB
>
> Sent: 2011ÿÿ9ÿÿ21ÿÿ 23:10
>
> To:sdpd...@yahoogroups.com
>
> Subject: [sdpd] Assistance
>
> Hello guys
>
> Can anyone help me, I need to calculate the particle size of a given CaCO3 powder, how do I proceed (practically) using HighScore Plus. I have the diffraction pattern.
>
> Thanks in anticipation.
>
> Make the world a better place to live in
>
> --- On Tue, 9/20/11, L_Solovyov <l_solovyov...@yahoo.com <mailto:l_solovyov%40yahoo.com> > wrote:
>
> From: L_Solovyov <l_solovyov...@yahoo.com <mailto:l_solovyov%40yahoo.com> >
>
> Subject: [sdpd] Re: question
>
> To:sdpd...@yahoogroups.com <mailto:sdpd%40yahoogroups.com>
>
> Date: Tuesday, September 20, 2011, 8:07 PM
>
>> What will be the real errors in this case?
>
> The uncertainties (sigmas) of the corrected profile intensities Icor are:
>
> sigma(Icor) = sigma(Io)*Icor/Io = Icor/sqrt(Io)
>
> where Io is the observed uncorrected profile intensity.
>
> *******************************************************
>
> Leonid A. Solovyov
>
> Institute of Chemistry and Chemical Technology
>
> 660049, K. Marx 42, Krasnoyarsk, Russia
>
> http://sites.google.com/site/solovyovleonid
>
> *******************************************************
>
> --- Insdpd...@yahoogroups.com <mailto:sdpd%40yahoogroups.com> , Radu Baies <radu.baies...@...> wrote:
>
>>
>
>> Dear All,
>
>> Our diffractometer is running with a variable divergence slit. The
>
>> data can be corrected for this using HighScore program.
>
>> In FullProf the errors are calculated assuming a Poisson distribution.
>
>> What will be the real errors in this case?
>
>> Thanks
>
>>
>
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> ------------------------------------
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> Yahoo! Groups Links
>
>
>
>
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