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 20899-8523USA
jcl...@nist.govmailto:jcl...@nist.gov
(301) 975 5793
FAX (301) 975 5334
From: rietveld_l-requ...@ill.fr [mailto:rietveld_l-requ...@ill.fr] On Behalf Of
Young, Lindsay Kay
Sent: Friday, July 10, 2015 1:28 PM
To: rietveld_l@ill.fr
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 alan.he...@neutronoptics.com
Send commands to lists...@ill.fr eg: HELP as the subject with no body text
The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/
++
