|
Bonjour Alan,
My problem with the Bob van Laar and Henk Schenk paper is that it would have been
credible if signed by van Laar alone or better by Loopstra and van Laar and also if
published before 1980 or 1990, not in 2018.
That 2018 paper looks strongly as initiated by Henk Schenk and the main arguments
inside are from old Rietveld-Schenk interferences, especially the story when Rietveld
refused to plaid guilty after being accused by Schenk in a very strange manner.
Now, the fact that Schenk was IUCr President may be sufficient for many people to
believe in his version of the story. It was not sufficient for Hugo Rietveld and it is not
sufficient for me.
Best
Armel
PS - Why to insert a reference to the 1981 Pawley paper in a 1988 paper where his
method was not used but another method much later named "Le Bail method" and based on the Rietveld (Loopstra ??? proove it please) decomposition formula ?
envoyé : 16 août 2023 à 19:08
de : Alan W Hewat <alan.he...@neutronoptics.com>
à : Le Bail Armel <le-bail.ar...@orange.fr>
cc : "rietveld_l@ill.fr" <rietveld_l@ill.fr>
objet : Re: Rietveld condamnation considered as established by some more people
Bonjour Armel.
In answer to your question "Where did they find the text of the judgement ?" please see: "The development of powder profile refinement at the Reactor Centre Netherlands at Petten" Bob van Laar and Henk Schenk
Van Laar worked at Petten with Rietveld, and Schenk was the IUCr president. This paper is apparently the basis of Mittemeijer's book. His point is that scientific discoveries are often the result of the work of many people, yet we tend to simplify the process and attribute them to individual heros. Mike Glazer is simply reviewing his book.
Salutations, Alan ________________________________ Dr Alan Hewat, NeutronOptics Grenoble, FRANCE (from phone) alan.he...@neutronoptics.com +33.476984168 VAT:FR79499450856 http://NeutronOptics.com/hewat_______________________________ In a book :
How Science Runs – Impressions from a Scientific Career. By Eric J. Mittemeijer
Reviewed by Mike Glazer
"In another section, the author has some criticism about the famous Rietveld method in powder diffraction. He points out that the original idea for this method was put forward by Bert O. Loopstra, who later discussed the idea of whole-pattern fitting with Bob van Laar. In order to create a computer program to carry out the method, they hired the computer-savvy Hugo M. Rietveld. The first paper by Loopstra and Rietveld was published in Acta Crystallographica in 1969, having been submitted in 1968. A later paper published in 1969 by Rietveld alone in Journal of Applied Crystallography is the one that is always quoted and led to the name ‘Rietveld method’ or ‘Rietveld refinement’. Mittemeijer points out that this did grave injustice to the originator of the method, Bert Loopstra. Rietveld later left science to become a librarian: Mittemeijer says the notion that he left science because he was disappointed that the method had not found wide acceptance at the time is just a ‘fairy tale’. Thus, according to the author, the profile refinement method should more justly be called the ‘Loopstra method’, concluding that this story has a sad ending."
https://www.iucr.org/news/newsletter/etc/articles?issue=156393&result_138339_result_page=39
Where did they find the text of the judgement ? Any verdict somewhere ? Condamned by "impressions" !
Any text from Loopstra who had a lot of time to tell something but never do it ?
Flagged at PubPeer :
https://blog.pubpeer.com/publications/79219E32306099C040C633FFABE6EC
https://blog.pubpeer.com/publications/05241C3D2890D43ED23BA1905CD32C
https://blog.pubpeer.com/publications/9D12C10951333B68B27FB891266A88
Best,
Armel Le Bail
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/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
|
