Ron Jenkins is General Manager at the International Centre for Diffraction Data in Newtown Square, Pennsylvania. He has been involved in X-ray research for over thirty years and has received several professional awards. Dr. Jenkins is the author of X-ray Fluorescence Spectrometry, An Introduction to X-ray Spectrometry, and six other books, as well as numerous papers and audio courses. He also wrote the section on X-ray technology in Kirk-Othmer Encyclo-pedia of Chemical Technology. Robert L. Snyder is Professor of Ceramic Science at New York State College of Ceramics at Alfred University,...