Re: [Ifeffit] About S02

2009-03-27 Thread Scott Calvin
Hi Damdin, Matt and Shelly have answered this very well, but I have one more thought to add. You have a mineralogical sample and apparently have a pretty good idea what the mineral is, since you're not varying r or n. Under those circumstances, you probably have a hypothesis as to the struc

Re: [Ifeffit] About S02

2009-03-27 Thread Matt Newville
Damdin, An XAFS book or theory that says "S02 must be between 0.8 and 1" overstates the case. In simplest terms, S02 is a fudge factor. There is a theoretical basis for it (passive electron overlap), but much of this can also be folded into other "loss terms" that are due to inelastic scattering

Re: [Ifeffit] About S02

2009-03-27 Thread Kelly, Shelly
8:19 AM > To: 'ifeffit@millenia.cars.aps.anl.gov' > Subject: [Ifeffit] About S02 > > Hello everyone, > > I am graduate student and doing EXAFS in my research. > > My question is about S02. From the XAFS books or theory it says that this > value must be between 0

[Ifeffit] About S02

2009-03-27 Thread Zuzaan, Damdinsuren
Hello everyone, I am graduate student and doing EXAFS in my research. My question is about S02. From the XAFS books or theory it says that this value must be between 0.8 to 1, but in the literature some people used different values like 0.25 or 1.4. In my case I fitted experimental RDF of my s