Hi Everyone,

If you like this thread, you will probably like Brian Toby's excellent
little treatise:

Brian H. Toby - R factors in Rietveld analysis: How good is good enough?
Powder Diffraction, v 21, p 67 (2006)

The journal Powder Diffraction doesn't have a super-wide circulation
but contains some gems such as this one (and many others!).

Simon



On Fri, Mar 6, 2009 at 4:24 AM, Eduard E. Levin <le...@elch.chem.msu.ru> wrote:
> Dear Olga!
> Maybe you should explain what do you mean by saying "background"?
> To my opinion you were given an exhaustive answer, but you still disagree
> with companions.
> This is puzzling.
> I suppose that you are assigning as background contribution from partially
> amorphous phase.
> Glass sample holder, for example, or carbon black.
> If I'm correct, that the answer would be simple - under this conditions you
> should never substract background.
>
>
> Eduard.
>
> ----- Original Message ----- From: "Olga Smirnova"
> <olga.smirn...@hw7.ecs.kyoto-u.ac.jp>
> Cc: <rietveld_l@ill.fr>
> Sent: Friday, March 06, 2009 8:55 AM
> Subject: Re: cRs
>
>
>>> As a rule, before doing that I'd switch to xye format to preserve the
>>> statistics
>>
>> Wow. What a rule.
>> Did anyone try to calculate simple mean deviance and compare with popular
>> R factors?
>>
>> OS
>>
>
>



--
Prof. Simon Billinge
Applied Physics & Applied Mathematics
Columbia University
500 West 120th Street
Room 200 Mudd, MC 4701
New York, NY 10027
Tel: (212)-854-2918 (o) 851-7428 (lab)

Condensed Matter and Materials Science
Brookhaven National Laboratory
P.O. Box 5000
Upton, NY 11973-5000
(631)-344-5387

email: sb2896 at columbia dot edu
home: http://nirt.pa.msu.edu/



-- 
Prof. Simon Billinge
Applied Physics & Applied Mathematics
Columbia University
500 West 120th Street
Room 200 Mudd, MC 4701
New York, NY 10027
Tel: (212)-854-2918 (o) 851-7428 (lab)

Condensed Matter and Materials Science
Brookhaven National Laboratory
P.O. Box 5000
Upton, NY 11973-5000
(631)-344-5387

email: sb2896 at columbia dot edu
home: http://nirt.pa.msu.edu/

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