Dear all,
I wonder if you could help with a GSAS problem? I'm refining HRPD (TOF)
data on a Ruddlesden-Popper related oxide, orthorhombic (pseudo
tetrgaonal), a, b ca. 5.5, c ca. 28A. Looks like the (220) is sharper than
normal and the (028), (02ten) etc broader (but not the 208, 20ten). How can
I model this with the peak shape fn. 3 - Lorentzian-double exponential. I
think the parameters reqwuired are gam2s and gam2e (gsf and g2ec). In
option "A" in the peak shape menu it asks for the broadening axis, whether
stacking faulting is required, and then two further vectors. Can you
suggest what these should
be, or at least what they represent in the general case?
Cheers, Phil
Dr P. Lightfoot, School of Chemistry, University of St. Andrews,
Purdie Building, St. Andrews, Fife, KY16 9ST
Tel: +44-1334-463841 Email: [EMAIL PROTECTED]
Fax: +44-1334-463808 WWW: http://ch-www.st-and.ac.uk/
