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<DIV><FONT color=#000000 size=3 face="Calibri Light">Dear GSAS
II,</FONT></DIV>
<DIV><FONT color=#000000 size=3 face="Calibri Light"></FONT> </DIV>
<DIV><FONT color=#000000 size=3 face="Calibri Light">Is it possible to do the
PONKCS[1] (Partial Or No Known Crystal Sturcture) analysis with GSAS II. With
PONKCS method, we can get the amount of the amorphous phases. </FONT></DIV>
<DIV><FONT color=#000000 size=3 face="Calibri Light"></FONT> </DIV>
<DIV><FONT color=#000000 size=3 face="Calibri Light">In most of the softwares
for PONKCS method, Pawley or LeBail fit (define the profile) were first
used with consequent refinement of HKL fit (the scale factor was employed for
the profile). The profile of the amorphous phase was fixed allowing just the
scale to shift during the refinement. The precision is
promising[1,2].</FONT></DIV>
<DIV><FONT color=#000000 size=3 face="Calibri Light"></FONT> </DIV>
<DIV><FONT color=#000000 size=3 face="Calibri Light">By calibrating the
<SPAN
style='FONT-FAMILY: "Calibri Light",sans-serif; COLOR: black; mso-fareast-font-family: SimSun'>(ZMV)<SUB>amorphous
</SUB></SPAN>for the amorphous content from the raw materials,we can get the
amount of the amporhous content in the mixture. More details regarding this
method is available in Ref [3].</FONT></DIV>
<DIV><FONT color=#000000 size=3 face="Calibri Light"></FONT> </DIV>
<DIV><FONT color=#000000 size=3 face="Calibri Light">Thanks for you
all!</FONT></DIV>
<DIV><FONT color=#000000 size=3 face="Calibri Light">Xuerun LI</FONT></DIV>
<DIV><FONT color=#000000 size=3 face="Calibri Light"></FONT> </DIV>
<DIV><FONT color=#000000 size=2 face="Calibri Light">Reference:</FONT></DIV>
<DIV><FONT color=#000000 size=2 face="Calibri Light">[1] Scarlett, N. V. Y. and
I. C. Madsen (2006). "Quantification of phases with partial or no known crystal
structures." Powder Diffraction 21(04): 278-284.</FONT></DIV>
<DIV><FONT color=#000000 size=2 face="Calibri Light">[2] Snellings, R., et al.
(2014). "Use of X-ray diffraction to quantify amorphous supplementary
cementitious materials in anhydrous and hydrated blended cements." Cement And
Concrete Research 64(0): 89-98.</FONT></DIV>
<DIV><FONT color=#000000 face="Calibri Light"><FONT size=2>[3] </FONT><A
href="http://www.icdd.com/ppxrd/08/presentations/VanHoyland-ppxrd-8.pdf"><FONT
size=2>http://www.icdd.com/ppxrd/08/presentations/VanHoyland-ppxrd-8.pdf</FONT></A></FONT><FONT
color=#000000 size=3 face="Calibri Light"></DIV>
<DIV><BR></DIV></FONT>
<DIV> </DIV>
<DIV align=left><FONT color=#c0c0c0 size=2
face=Verdana>2015-06-16</FONT></DIV><FONT size=2 face=Verdana>
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<DIV style="FONT-SIZE: 13px; FONT-FAMILY: Tahoma"><SPAN
style="FONT-SIZE: 14px"><FONT size=3 face=Calibri>Xuerun
LI</FONT></SPAN></DIV><SPAN style="FONT-SIZE: 14px"></SPAN></DIV>
<DIV><SPAN style="FONT-SIZE: 14px">
<DIV><FONT face=Calibri>Postdoc Researcher</FONT></DIV>
<DIV><FONT face=Calibri></FONT> </DIV>
<DIV><FONT face=Calibri>Laboratory of Construction Materials</FONT></DIV>
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Lausanne</SPAN></FONT></FONT></DIV>
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