Sorry Jim. Even if your attachment is tiny, if I make exceptions it's unfair to those who have been banned for the same thing. It's only a week, and nothing personal.
Why don't you put these plots on your sales site: https://www-s.nist.gov/srmors/viewTableH.cfm?tableid=149 Alan. On 14 July 2015 at 12:53, Cline, James Dr. <[email protected]> wrote: > I hope I don’t get shot for this, only 64 kb: > > > > FWHM values of various SRMs: > > Regards, > > > > Jim > > > > > > James P. Cline > Materials Measurement Science Division > National Institute of Standards and Technology > 100 Bureau Dr. stop 8520 [ B113 / Bldg 217 ] > Gaithersburg, MD 20899-8523 USA > [email protected] > (301) 975 5793 > FAX (301) 975 5334 > > > > *From:* Fabrizio Guzzetta [mailto:[email protected]] > *Sent:* Tuesday, July 14, 2015 3:24 AM > *To:* Cline, James Dr. > *Cc:* Young, Lindsay Kay; [email protected] > *Subject:* Re: Obtaining a silicon standard wafer > > > > Thanks Jim for the useful info. I was not aware of this kind of silicon > standard until now. But can't be polycrystallinity of Silicon a drawback to > use it as standard? Or is there a way to "purify" a single phase suitable > to use as standard? I have always found more useful having LaB6 or corundum > (whenever LaB6 is expensive to find) to use it as standard to compare > instrumental peak broadening. In some of the Rietveld software I use or I > know, also yttria is used to determine peak broadening. Which criteria do > you use when choosing a suitable pxrd standard to compare your unknown? Why? > > > > Thanks for the enlightening discussion. > > > Fabrizio Guzzetta > > Ph.D. student, Dept. Quimica Inorganica y Organica, UJI > > Castellon de la Plana > > Spain > > > > 2015-07-13 19:56 GMT+02:00 Cline, James Dr. <[email protected]>: > > Lindsay, > > > > I’ve seen pressed discs of silicon powder that were supplied with older > Philips diffractometers, and I understand that PANalytical will presently > supply them with their new machines. NIST offers no such standard of > silicon in a disc format. But I can suggest that you consider SRM 640e > which is supplied as powder. One can mount a specimen of it carefully to > obtain high density and a flat specimen surface, and then infiltrate the > powder bed with silicone based liquid resin such as Vacseal. See: > > > > http://www.2spi.com/catalog/vac/vacleak.shtml > > > > The surface of the compact will darken to a uniform color when the > infiltration is complete. This will result in a stable compact with the > diffraction properties of SRM 640e. > > > > Regards, > > > > Jim > > > > > > James P. Cline > Materials Measurement Science Division > National Institute of Standards and Technology > 100 Bureau Dr. stop 8520 [ B113 / Bldg 217 ] > Gaithersburg, MD 20899-8523 USA > [email protected] > (301) 975 5793 > FAX (301) 975 5334 > > > > *From:* [email protected] [mailto:[email protected]] *On > Behalf Of *Young, Lindsay Kay > *Sent:* Friday, July 10, 2015 1:28 PM > *To:* [email protected] > *Subject:* Obtaining a silicon standard wafer > > > > Hello Rietvelders - > > > > This is not exactly a data question, but I am sure someone here can help. > I am looking into purchasing a silicon powder standard wafer for PXRD > instrument alignment. However, I am not sure where to get one or how much I > might expect one to cost. My questions to all of you are: > > > > - Do you know where I could purchase this type of standard? > > - How much would you expect to pay for one? > > - I have been told Gem Dugout makes these, but they may not be around any > more. Does anyone know what happened to them? > > > > Thank you very much for your help, and I hope you all have a great > weekend! > > > > - Lindsay Young > > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Please do NOT attach files to the whole list <[email protected] > > > Send commands to <[email protected]> eg: HELP as the subject with no body > text > The Rietveld_L list archive is on > http://www.mail-archive.com/[email protected]/ > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Please do NOT attach files to the whole list <[email protected] > > > Send commands to <[email protected]> eg: HELP as the subject with no body > text > The Rietveld_L list archive is on > http://www.mail-archive.com/[email protected]/ > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > > -- ______________________________________________ * Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE * <[email protected]> +33.476.98.41.68 http://www.NeutronOptics.com/hewat ______________________________________________
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Please do NOT attach files to the whole list <[email protected]> Send commands to <[email protected]> eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/[email protected]/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
