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RE: [sdpd] Assistance

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      <p>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.<br>
<br>
Thanks in anticipation<br>
<br>
Make the world a better place to live in<br>
<br>
--- On Wed, 9/21/11, Xiaodong Wang &lt;<a href="mailto:iangie%40126.com";>iangie...@126.com</a>&gt; wrote:<br>
<br>
From: Xiaodong Wang &lt;<a href="mailto:iangie%40126.com";>iangie...@126.com</a>&gt;<br>
Subject: RE: [sdpd] Assistance<br>
To: <a href="mailto:sdpd%40yahoogroups.com";>sdpd...@yahoogroups.com</a><br>
Date: Wednesday, September 21, 2011, 8:39 AM<br>
<br>
 <br>
<br>
Is your particle calcite?<br>
<br>
Have you checked SEM images of these powder to see the extend of platy shape?<br>
<br>
Just be careful about the preferred orientation effect when using Bragg-Brentano geometry.<br>
<br>
If not, then you can use peak FWHM to estimate the coherent scatter dimension.<br>
<br>
Yours Sincerely<br>
<br>
-------------------<br>
<br>
Xiaodong (Tony) Wang<br>
<br>
Department of Imaging and Applied Physics<br>
<br>
Curtin University<br>
<br>
From: <a href="mailto:sentto-1052548-2737-1316617777-iangie%3D126.com%40returns.groups.yahoo.com";>sentto-1052548-2737-1316617777-iangie=126.com...@returns.groups.yahoo.com</a> [mailto:<a href="mailto:sentto-1052548-2737-1316617777-iangie%3D126.com%40returns.groups.yahoo.com";>sentto-1052548-2737-1316617777-iangie=126.com...@returns.groups.yahoo.com</a>] On Behalf Of JB<br>
<br>
Sent: 2011å¹´9æ??21æ?¥ 23:10<br>
<br>
To: <a href="mailto:sdpd%40yahoogroups.com";>sdpd...@yahoogroups.com</a><br>
<br>
Subject: [sdpd] Assistance<br>
<br>
Hello guys<br>
<br>
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. <br>
<br>
Thanks in anticipation.<br>
<br>
Make the world a better place to live in<br>
<br>
--- On Tue, 9/20/11, L_Solovyov &lt;<a href="mailto:l_solovyov%40yahoo.com";>l_solovyov...@yahoo.com</a> &lt;mailto:l_solovyov%40yahoo.com&gt; &gt; wrote:<br>
<br>
From: L_Solovyov &lt;<a href="mailto:l_solovyov%40yahoo.com";>l_solovyov...@yahoo.com</a> &lt;mailto:l_solovyov%40yahoo.com&gt; &gt;<br>
<br>
Subject: [sdpd] Re: question<br>
<br>
To: <a href="mailto:sdpd%40yahoogroups.com";>sdpd...@yahoogroups.com</a> &lt;mailto:sdpd%40yahoogroups.com&gt; <br>
<br>
Date: Tuesday, September 20, 2011, 8:07 PM<br>
<br>
&gt; What will be the real errors in this case?<br>
<br>
The uncertainties (sigmas) of the corrected profile intensities Icor are:<br>
<br>
sigma(Icor) = sigma(Io)*Icor/Io = Icor/sqrt(Io)<br>
<br>
where Io is the observed uncorrected profile intensity.<br>
<br>
*******************************************************<br>
<br>
Leonid A. Solovyov<br>
<br>
Institute of Chemistry and Chemical Technology<br>
<br>
660049, K. Marx 42, Krasnoyarsk, Russia<br>
<br>
<a href="http://sites.google.com/site/solovyovleonid";>http://sites.google.com/site/solovyovleonid</a><br>
<br>
*******************************************************<br>
<br>
--- In <a href="mailto:sdpd%40yahoogroups.com";>sdpd...@yahoogroups.com</a> &lt;mailto:sdpd%40yahoogroups.com&gt; , Radu Baies &lt;radu.baies...@...&gt; wrote:<br>
<br>
&gt;<br>
<br>
&gt; Dear All,<br>
<br>
&gt; Our diffractometer is running with a variable divergence slit. The<br>
<br>
&gt; data can be corrected for this using HighScore program.<br>
<br>
&gt; In FullProf the errors are calculated assuming a Poisson distribution.<br>
<br>
&gt; What will be the real errors in this case?<br>
<br>
&gt; Thanks<br>
<br>
&gt;<br>
<br>
[Non-text portions of this message have been removed]<br>
<br>
[Non-text portions of this message have been removed]<br>
<br>
[Non-text portions of this message have been removed]<br>
<br>
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