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A Round Robin Test to Evaluate Computer Search/Match Methods for Qualitative Powder Diffractometry.

Published online by Cambridge University Press:  06 March 2019

Ron Jenkins
Ron Jenkins*
Affiliation:
Philips Electronic Instruments, Inc. Mount Vernon, New York 10550
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Abstract

A preliminary round robin test to evaluate available computer search/match has been carried out and comparisons made with handsearching techniques. Participants in the teat were all experienced diffractionists and a variety of data collection instrumentation was employed. Hand-searching and computer searching were found to be equally efficient, about 70-80%, for the mineral and inorganic samples provided that the quality of the “d” values was good (1 in 1000). Although the computer methods were much quicker, they were found to be much more sensitive to the quality of the “d” values. Where elemental data was used to assist in computer searching, much poorer “d“ values (3 in 1000) were acceptable. Hand-searching was found to be vastly superior to computer searching for the organic specimen.

Type
X-Ray Powder Diffraction
Information
Advances in X-Ray Analysis , Volume 20: Twenty-Fifth Annual Conference on Applications of X-ray Analysis, August 4-6, 1976 , 1976 , pp. 125 - 137
Copyright
Copyright © International Centre for Diffraction Data 1976

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References

1. Hanawalt, .J.D., Rinn, .H.W. and Frevel, .L.K., Ind. Eng. Chem. Anal.Ed, 10 (1938) 457.Google Scholar
2. The Fink Numerical Index to the Powder Diffraction File, Joint Committee on Powder Diffraction Standards.Google Scholar
3. The Joint Committee on Powder Diffraction Standards, 1601 Park Lane, Swarthmore, Pennsylvania 19081.Google Scholar
4. Johnson, .G.G., and VAnd, .V., Ind. Eng. Chem., 59 (1967) 19.Google Scholar
5. Frevel, .L.K., and Adams, .C.E., Anal. Chem., 40 (1968) 1335.Google Scholar
6. Nichols, .M., and Bideaux, .R.A., 24th Pittsburgh Diffraction Conference (1966) Paper No.B-3.Google Scholar
7. User Guide, Data Base and Search Programs, by Johnson, G. G., JCPDS (1974).Google Scholar