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H Neng, You will encounter large systematic errors due to microabsorption when you have phases with very different μ, which is the case for Ni (μ=439 cm-1) and Co (μ=3150 cm-1) for Cu Kα radiation. Use a Co or Mo anode. μ (cm-1) Cu anode Co</div>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">H Neng,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">You will encounter large systematic errors due to microabsorption when you have phases with very different μ, which is the case for Ni (μ=439 cm<sup>-1</sup>) and Co (μ=3150
cm<sup>-1</sup>) for Cu Kα radiation. Use a Co or Mo anode.<o:p></o:p></span></p>
<table class="MsoTableGrid" border="1" cellspacing="0" cellpadding="0" style="border-collapse:collapse;border:none">
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<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">μ (cm<sup>-1</sup>)
<o:p></o:p></span></p>
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<td width="156" valign="top" style="width:116.85pt;border:solid windowtext 1.0pt;border-left:none;padding:0in 5.4pt 0in 5.4pt">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Cu anode<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Co anode<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Mo anode<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Co<o:p></o:p></span></p>
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<td width="156" valign="top" style="width:116.85pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">3150<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">587<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">370<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Ni<o:p></o:p></span></p>
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<td width="156" valign="top" style="width:116.85pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">439<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">668<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">422<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">c.f. “microabsorption” and<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><a href="https://urldefense.us/v3/__https://www.researchgate.net/publication/337448242_Beware_if_you_are_Using_Cobalt_Effect_of_Fluorescence_and_Microabsorption_on_XRD_Patterns__;!!G_uCfscf7eWS!YPLIIeA6T8lVbFbQem04D8UQhCJoi59PXS65f6qsGz9ye6I2_yRVxPaSyrglWikSqWAIHSKYKfLpIJIWiy0$">https://www.researchgate.net/publication/337448242_Beware_if_you_are_Using_Cobalt_Effect_of_Fluorescence_and_Microabsorption_on_XRD_Patterns</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Lucida Calligraphy"">William Boyer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><>< ><><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Cambria",serif">Proto Manufacturing Inc</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> -
<a href="mailto:wboyer@protoxrd.com">wboyer@protoxrd.com</a></span><span style="font-size:11.0pt;font-family:"Cambria",serif"> - Materials Scientist<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> GSAS-II <gsas-ii-bounces@aps.anl.gov>
<b>On Behalf Of </b>Neng Huang via GSAS-II<br>
<b>Sent:</b> Wednesday, December 4, 2024 3:22 PM<br>
<b>To:</b> gsas-ii@aps.anl.gov<br>
<b>Subject:</b> [GSAS-II] Quantification of Nickel and Cobalt alloy by refinement in GSAS-II<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">Hello, I am encountering an issue with quantifying Nickel and Cobalt by weight percentage in GSAS-II for my powder X-ray data from a reduced battery sample. Since
the two phases are quite close, the Wt. fractions of the two phases in GSAS seem<o:p></o:p></span></p>
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<p class="MsoNormal">Hello,<br>
<br>
I am encountering an issue with quantifying Nickel and Cobalt by weight percentage in GSAS-II for my powder X-ray data from a reduced battery sample. Since the two phases are quite close, the Wt. fractions of the two phases in GSAS seem to be not reasonable,
could you please advise on how to adjust the steps in GSAS-II to accurately determine the phase concentration in the Ni-Co alloy mixtures by refinement?<br>
<br>
Thank you.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best regards,<o:p></o:p></p>
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<p class="MsoNormal">Neng Huang<o:p></o:p></p>
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<p class="MsoNormal">University of Kentucky<o:p></o:p></p>
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