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The first two derivative parameters serve as the basic data for a powerful method for the identification and characterization of compounds. The following is a list of the principal publications from the Research Associateship program. The NBS staff provided the technical guidance for the entry process and wrote the key computer programs which were necessary for the creation and critical evaluation of the computer database. Her research interests include crystallography and phase equilibria of high-temperature oxides. Also, earlier patterns have been revised as new techniques became available. In the late s, a meeting was held at Gibson Island, MD to discuss the formation of an ongoing file of x-ray powder diffraction patterns of chemical phases for use in identifying materials. Uploader: Zuluzshura Date Added: 28 October 2008 File Size: 58.12 Mb Operating Systems: Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X