*/> Loopstra is not alive either/* (A fact. True).
> */Scientists cannot ask anyone for the absolute truth/* (A
consideration valid for one but also for two, and beyond).
> */We have to look at the available evidence, and different people may
reach different conclusions./* (A well-based scientific -human- statement)
>*/If you want the opinion of the actual people involved, you now have
van Laar's account and you have Rietveld's account/*. Again, too bad
that Dr. Rietveld is not alive. In my humble opinion, for the sake of
the proper scientific exchange of ideas and facts in the _actual
context_, Dr. Rietveld’s statements of many years ago is not enough. The
vL&S publication, after the passing of Dr. Rietveld, needs a lot more
than that.
On 8/20/2018 1:47 AM, Alan Hewat wrote:
*> For the sake of the scientific exchange of ideas and facts, too bad
that Dr. Rietveld is not alive.*
Loopstra is not alive either. Scientists cannot ask anyone for the
absolute truth. We have to look at the available evidence, and
different people may reach different conclusions. If you want the
opinion of the actual people involved, you now have van Laar's account
<http://journals.iucr.org/a/issues/2018/02/00/ib5058/> and you have
Rietveld's account <%20http://home.wxs.nl/%7Erietv025/>.
*> ...why did this happen 49 years after?*
1) At Petten there was apparently a problem from the beginning.
According to vL&S <http://journals.iucr.org/a/issues/2018/02/00/ib5058/>
"/After publishing this important project alone, Rietveld found his
position in the small Petten group increasingly difficult. In 1974 he
successfully applied for the post of head of the RCN library/"
2) For the first 20 years, it simply wasn't important
"/It was only really adopted by the wider crystallographic community
20 years later, after the original small group at Petten had all left
science/".
3) When the importance of the method was finally recognised, these
reservations about its origins were published, at least in the NL - D.
Andriesse (2000), H. Schenk (2001) as quoted by vL&S
<http://journals.iucr.org/a/issues/2018/02/00/ib5058/>.
*Just as profile refinement "/did not suddenly appear in a flash of
inspiration of a single person/", questions about the origin of the
method did not suddenly appear in 2018.*
On Mon, 20 Aug 2018 at 07:35, Davide Levy <davide.lev...@gmail.com
<mailto:davide.lev...@gmail.com>> wrote:
Hi,
I am too young and out of the mainstream of powder diffraction to
know all the stories about the born of the Rietveld Method.
My question is: the article of Rietveld is published in 1969 and
the article about the born of this method come out after that
Hugo Rietveld pass away, why did this happen 49 years after?
*Dr. Davide Levy, Ph.D.*
*Head of XRD laboratory
Wolfson Applied Materials Research Center*
*Tel Aviv University*
*Phone: +972-3-6407815 <tel:+972%203-640-7815>*
*Fax: +972-3-6407819 <tel:+972%203-640-7819>*
*http://www3.tau.ac.il/wamrc/ <http://www3.tau.ac.il/wamrc/>*
http://www3.tau.ac.il/wamrc/templates/labs_3/images/new-tau-logo.pngWAMRC-LOGO_new
*From:*rietveld_l-requ...@ill.fr
<mailto:rietveld_l-requ...@ill.fr>
[mailto:rietveld_l-requ...@ill.fr
<mailto:rietveld_l-requ...@ill.fr>] *On Behalf Of *Le Bail Armel
*Sent:* Monday, 20 August, 2018 2:22 AM
*To:* Rietveld_l@ill.fr <mailto:Rietveld_l@ill.fr>
*Subject:* Re: Rietveld
*>"...*/*the method did not suddenly appear in a flash of
inspiration of a single person, but was the result of the work of
three individuals... Loopstra, van Laar and Rietveld.*/*".*
And more precisely :
" HS wrote in Dutch:
‘Loopstra had the idea that it should be better to use the whole
powder profile rather than estimated intensities to solve
structures, van Laar worked it out mathematically and Rietveld
programmed it."
I conclude then :
no idea for Rietveld and van Laar since they are from Loopstra;
no mathematics for Rietveld and Loopstra;
no programming for Loopstra and van Laar.
A very clear result of the work of three individuals. The HS view...
Seems that Rietveld had not the same opinion and claimed for ideas
too and possibly for mathematics as well.
Best,
Armel
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Please do NOT attach files to the whole list
<alan.he...@neutronoptics.com>
Send commands to <lists...@ill.fr <mailto: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/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
--
______________________________________________
* Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE *
<alan.he...@neutronoptics.com> +33.476.98.41.68
http://www.NeutronOptics.com/hewat
______________________________________________
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
