Published online by Cambridge University Press: 06 March 2019
A Search/Match program using digitized X-ray powder diffraction Scans as inputs was presented in 1987 at the Denver Conference. This program has been rewritten to take full advantage of ttie newest capabilities of high end personal Computers. Software improveraents combined with the faster processing speed make it possible to search the 53,791 pattern data base in less than 16 seoonds typically (Compaq Deskpro 386/30 with 9 MB of RAM and 80387-20 numerioal processor), This can be compared to the 90 seconds one year ago. A specific program allows the user to create and, if desired, customize the searoh data base directly from the CD-ROM PDF-2, making Updates much easier. Praotiaal examples are given to illustrate the Operation of the proprietary pattern-recognition algorithm used in the search program.