To all:
Initially I sent this to Alan who suggested I open discussion to the entire
community. I've posted similar in past years and have been FLAMED. Please
keep it civil. ;-)
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As a long time practitioner of powder XRD (since 1972) I was there when the
superconductor craze hit in the mid-1980s. At that time it was recognized the
Rietveld Method was useful only for REFINING structures which were generally
accepted from single crystal x-ray analysis.
The http://www.cristal.org/rietv025/ link says the method "[allows] an accurate
determination of the structure." I take that statement to mean no model is
required; Rietveld Analysis can determine structure without preconceived model.
Thanks for reading.
Blessings from toasty and warm St. Louis, MO.
Frank May
Research Investigator
University of Missouri-St. Louis
formerly at Monsanto Company (which recently became part of BAYER)
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