Dear Rietveldians, Can anybody give an explanation of a severe discrepancy in the experimentally measured Reference Intensity Ratios (RIR) and those calculated from structure for some metals, such as Zn, Ti, Cd etc. in the ICDD PDF? In particular for Zn, the experimental RIR from ICDD PDF 00-004-0831 is 3.8, while the calculated RIR from PDF 01-078-9363 is 8.39. For Cd the difference is more impressive: RIR=2 in PDF 00-005-0674 and 15 in PDF 01-071-3769. For the experimental RIRs a reference is given: Swanson, Tatge., Natl. Bur. Stand. (U. S.), Circ. 539, I, 16, (1953), which is inaccessible for me, unfortunately.
Any hypothesis? Leonid ******************************************************* Leonid A. Solovyov Institute of Chemistry and Chemical Technology 660036, Akademgorodok 50/24, Krasnoyarsk, Russia http://sites.google.com/site/solovyovleonid *******************************************************
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