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RE: [sdpd] LaB6 standard sample preparation
I stand corrected. It was indeed on Y2O3 that the annealing was suggested,
I remember now.
Thanks for the information.
Sven
> -----Original Message-----
> From: L. Cranswick [mailto:L.M.D.Cranswick...@dl.ac.uk]
> Sent: donderdag 23 augustus 2001 11:50
> To: sdpd...@yahoogroups.com
> Subject: Re: [sdpd] LaB6 standard sample preparation
>
>
>
> > I know this has been discussed before, but I can't find the
> references. We
> > have purchased a batch of the LaB6 standard powder and we
> want to prepare a
> > suitable powder diffraction sample. I was thinking about
> pressing the
> > powder in a pellet, but I seem to remember some people (I think Dr.
> > Cranswick was one of them) talking about annealing the
> sample to avoid
> > preferential orientation. Can someone point me to some
> references about it,
> > possibly on the internet ?
>
> Unless I am confusing my history - I believe Joerg Bergmann posted
> to this or the Rietveld list saying the latest LaB6 is of very
> good quality and can be run native(?). One option could be to
> bind the sample into an epoxy polymer and polish it down to
> a flat surface - but not sure what others may think of this.
> It would at minimum complicate the background.
>
> With me being quoted:
> I may have been refering to Y2O3 - annealing this to make a
> nice profile standard. Though Joerg did say that the new
> NIST LaB6 was better than "annealed Y2O3". I have not had the
> chance to run both and compare.
>
> The Rietveld list may be a better place to post if there
> is not a variety of replies on this.
>
> Lachlan.
>
>
> --
> -----------------------
> Lachlan M. D. Cranswick
> Collaborative Computational Project No 14 (CCP14)
> for Single Crystal and Powder Diffraction
> Birkbeck University of London and Daresbury Laboratory
> Postal Address: CCP14 - School of Crystallography,
> Birkbeck College,
> Malet Street, Bloomsbury,
> WC1E 7HX, London, UK
> Tel: (+44) 020 7631 6849 Fax: (+44) 020 7631 6803
> E-mail: l.m.d.cranswick...@dl.ac.uk
> WWW: http://www.ccp14.ac.uk
>
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