,
Florentino Sánchez
De: "François Goutenoire"
Para: "rietveld l"
Enviados: Jueves, 4 de Marzo 2021 10:41:05
Asunto: Re: Hyper-Lorentzian effect on quantitative analysis
Dear Rietveld users,
Thank you very much for all your responses, it will help us move forward on the
subjec
%. The micro-absorption effect has
been minimized (mu of the internal standard is closed to the compound).
But with some electronic transmission analysis no amorphous is observed.
The question is : Does a strong hyper-Lorentzian peak shape could influence
quantitative analysis ?
François
ect on quantitative analysis
Dear Rietveld users,
I have some industrial compound presenting a strong hyper-Lorentzian peak shape
(eta=1.1 with HighScore). When we calculate the amorphous content after an
internal standard addition, the result is 40%. The micro-absorption effect has
been minimized
0%. The micro-absorption effect
> has been minimized (mu of the internal standard is closed to the compound).
>
> But with some electronic transmission analysis no amorphous is observed.
>
> The question is : Does a strong hyper-Lorentzian peak shape could influence
-Original Message-
From: rietveld_l-requ...@ill.fr On Behalf Of
François Goutenoire
Sent: onsdag 3. mars 2021 13.34
To: rietveld_l@ill.fr
Subject: Hyper-Lorentzian effect on quantitative analysis
Dear Rietveld users,
I have some industrial compound presenting a strong hyper-Lorentzian peak
equ...@ill.fr [mailto:rietveld_l-requ...@ill.fr] Im Auftrag
von Wörle Michael
Gesendet: Mittwoch, 03. März 2021 15:32
An: rietveld_l@ill.fr
Betreff: AW: Hyper-Lorentzian effect on quantitative analysis
Dear François,
Maybe you have a strongly disordered system. Depending on the type of disor
: Wednesday, 3 March 2021 13:34
An: rietveld_l@ill.fr
Betreff: Hyper-Lorentzian effect on quantitative analysis
Dear Rietveld users,
I have some industrial compound presenting a strong hyper-Lorentzian peak shape
(eta=1.1 with HighScore). When we calculate the amorphous content after an
internal
Does a strong hyper-Lorentzian peak shape could
> influence quantitative analysis ?
>
> François
>
> --
>
> *
> Pr. Francois GOUTENOIRE
> e-mail: francois.gouteno...@univ-lemans.fr
> Tel: 0
ian peak shape could influence
quantitative analysis ?
François
++
Please do NOT attach files to the whole list
<mailto:alan.he...@neutronoptics.com>
Send commands to <mailto:lists...@ill.fr> eg: HELP as the
subject with
not see that,
then the quantitative analysis is certainly misleading.
Best
Reinhard Neder
Am 03.03.21 um 13:34 schrieb François Goutenoire:
Dear Rietveld users,
I have some industrial compound presenting a strong hyper-Lorentzian
peak shape (eta=1.1 with HighScore). When we calculate
standard is closed to the compound).
But with some electronic transmission analysis no amorphous is observed.
The question is : Does a strong hyper-Lorentzian peak shape could influence
quantitative analysis ?
François
inexpensive), but you can evaluate it yourself.
Regards,
David
On 1/23/2018 1:05 AM, Davide Levy wrote:
Hi
I would like to buy alumina standard to use for XRD quantitative
analysis. I looked in NIST website and it finished. Sigma-aldrich
sells it but is too expensive.
do you know other
<rietveld_l-requ...@ill.fr> per conto di Fabrizio
Guzzetta <fabrizio.guzze...@gmail.com>
Inviato: martedì 23 gennaio 2018 13:25
A: Davide Levy; rietveld_l@ill.fr
Oggetto: Re: Alumina standard for quantitative analysis
davide, you can look the same dealers for neutron diffraction as we
escribió:
> Hi
>
> I would like to buy alumina standard to use for XRD quantitative analysis.
> I looked in NIST website and it finished. Sigma-aldrich sells it but is
> too expensive.
> do you know other suppliers? Or other quantitative analysis standards?
>
> T
Hi
I would like to buy alumina standard to use for XRD quantitative analysis. I
looked in NIST website and it finished. Sigma-aldrich sells it but is too
expensive.
do you know other suppliers? Or other quantitative analysis standards?
Thanks
Dr. Davide Levy, Ph.D.
Director of XRD
Dear Madam/Sir(s),
I am performing Rietveld analysis for a sample containing perovskites
(CaTiO3 and SrTiO3). When putting-in a preferred orientation (PO)
correction (100 direction, as the crystals are cubic-like), I obtain
better Rwp and GOF i.e. chi-squared values (9.63 and 1.5, respectively)
Dear Lukasz,
First of all, in the majority of Rietveld programs the uniaxial preferred
orientation (such as [100]) can not be handled adequately for cubic systems
since the programs normally generate only one symmetrically equivalent hkl for
a diffraction peak. In DDM, for such cases, I
[EMAIL PROTECTED] a écrit :
Hi Blaise
In Bragg-Brentano mode, sample spinning does nothin for PO. This is
because the diffraction vector is normal to the sample surface, and
sample spinning rotates along this vector.
That's wrong! As I have already written, the empirical PO corrections
hi all,
not only fibre like, but single component fibre, and with the fibre axis
parrallel to the sample normal (i.e. cyclic fibre. this is very
restrictive and generally does not correspond to the real texture.
Contrarilly to what has been said here or there, the March-Dollase does
not ensure PO
***
--- On Mon, 10/27/08, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
From: [EMAIL PROTECTED] [EMAIL PROTECTED]
Subject: Quantitative analysis
To: Rietveld_l@ill.fr
Date: Monday, October 27, 2008, 3:48 PM
Dear all,
I have this question
Sorry to disagree. Experience tells me otherwise - the March-Dollase correction
has nearly always led to poor quant results for me. It most certainly cannot be
applied safely.
Martin
--
M Vickers
Dept of Chemistry
UCL
Subject: Re: Quantitative
Subject: Re: Quantitative analysis
Date: Tue, 28 Oct 2008 02:53:20 -0700
From: [EMAIL PROTECTED]
To: Rietveld_l@ill.fr
Dear Mario,
One more possible problem of applying preferred orientation
corrections in QPA
Subject: RE: Quantitative analysis
Dear Mario,
Please tell me a little about the data collection conditions you used for this
work:-
How was the sample prepared (hand ground, micronised in McCrone mill )
What was the tube target Cu, Co, other ??
Cheers
Ian Madsen
: (613) 991 2384
Email: [EMAIL PROTECTED]
-Original Message-
From: Leonid Solovyov [mailto:[EMAIL PROTECTED]
Sent: October 28, 2008 5:53 AM
To: Rietveld_l@ill.fr
Subject: Re: Quantitative analysis
Dear Mario,
One more possible problem of applying preferred orientation corrections in QPA
results for me. It most
certainly cannot be applied safely.
Martin
--
M Vickers
Dept of Chemistry
UCL
--
Subject: Re: Quantitative analysis
Date: Tue, 28 Oct 2008 02:53:20 -0700
From: [EMAIL PROTECTED]
To: Rietveld_l@ill.fr
Dear Mario
Madsen
From: [EMAIL PROTECTED] [EMAIL PROTECTED]
Sent: Tuesday, October 28, 2008 2:48 AM
To: Rietveld_l@ill.fr
Subject: Quantitative analysis
Dear all,
I have this question,
I have been refined one mixture (of well-know percentage composition
: Quantitative analysis
I agree that it's always best to avoid preferred orientation, but that
is easier said than done on a routine basis. I have personally had good
luck with the M-D PO correction on many known samples, as long as the PO
was not severe.
However, I imagine that Mario's
]; rietveld_l@ill.fr
*Subject:* RE: Quantitative analysis
I agree that it's always best to avoid preferred orientation, but that
is easier said than done on a routine basis. I have personally had good
luck with the M-D PO correction on many known samples, as long as the PO
was not severe
: RE: Quantitative analysis
Dear all,
the well-known data are: CaCO3 (20%), CaF2 (35%), SiO2 (1%), Al2O3 (20%), and
FeCO3 (24%). The data obtained without PO are: CaCO3 (24%), CaF2 (36%), SiO2
(1%), Al2O3 (17%), and FeCO3 (23%). The data obtained with PO
are: CaCO3 (19%), CaF2 (32%), SiO2 (2
PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: October 28, 2008 8:24 AM
To: Rietveld_l@ill.fr
Subject: RE: Quantitative analysis
Dear all,
the well-known data are: CaCO3 (20%), CaF2 (35%), SiO2 (1%), Al2O3 (20%),
and FeCO3 (24%). The data obtained without PO are: CaCO3 (24%), CaF2
(36%), SiO2 (1
Spinning the sample doesn't reduce preferred orientation much. It does,
however, improve ones counting statistics very nicely.
Martin
M Vickers
Dept. of Chemistry
UCL
20, Gordon Street
London
WC1E 0HX
Subject: RE: Quantitative analysisDate: Tue, 28 Oct
Fax: +61 3 9562 8919 (site)
Email: [EMAIL PROTECTED]
From: Mibeck, Blaise [mailto:[EMAIL PROTECTED]
Sent: Wednesday, 29 October 2008 01:25
To: rietveld_l@ill.fr
Subject: RE: Quantitative analysis
I am learning QPA and am worried about PO.
I wonder why sample
Dear all,
I have this question,
I have been refined one mixture (of well-know percentage composition) of
CaCO3, CaF2, SiO2 and Al2O3, with preferential orientation in CaCO3 (104)
and CaF2 (111) with good results. When I add to the mixture FeCO3 and I
refine with preferential orientation (104),
and Biochemistry
Arizona State University
Tempe, AZ 85287-1604
phone (480)-965-8853
fax (480)-965-2747
***
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Monday, October 27, 2008 8:48 AM
To: Rietveld_l@ill.fr
Subject: Quantitative analysis
Dear all,
I have
Dear Mario, My experience of quant Rietveld is much the same as yours - poor
quant result if using any sort of PO function. Advise as others have here -
reduce PO. Capillary geometry may help in many instances but in this case could
then have problems with absorption seeing as you will most
: Re: Laboratory supplies/equipments for application of the Rietveld
Method (quantitative analysis)Date: Wed, 26 Sep 2007 10:51:00 -0400From: [EMAIL
PROTECTED]: [EMAIL PROTECTED] the gem dugout for zero background sample
holders, and angle/intensity standards.
http://www.thegemdugout.com
Hi All!!
I´m searching for some equipments, supplies that could be useful to the
application of the Rietveld Method (quantitative analisys) like zero-background
sample holders, mill etc... in other words, equipments for sample prepare to
avoid preferred orientation, microabsorption, etc..
Try the gem dugout for zero background sample holders, and angle/
intensity standards.
http://www.thegemdugout.com/
On Sep 26, 2007, at 9:30 AM, Leandro Bravo wrote:
Hi All!!
I´m searching for some equipments, supplies that could be useful to
the application of the Rietveld Method
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