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Crystallography: Powder Diffraction File

Information resources for crystallography research [shortcut: ucsd.libguides.com/crystallography]

Accessing the Powder Diffraction File Database

PDF-4+ is installed on the computer workstation near the Research Advisory Desk (Geisel 2, West Wing) by the windows. It is not available online.

  • Bring a USB drive to save any PDF cards. Or you can contact me to check if PDF-4+ has your compound and I'll send you
  • The PDF card will download as an XML document, accompanied by an XSL style sheet called pdfcard.xsl. Keep the XSL file in the same folder with the XML document, otherwise the PDF card will not be readable when you open it. If you email the PDF card, include the XSL file as well.

Powder Diffraction File (PDF-4+) contains over 365,000 entries of inorganic diffraction data for crystals and powders, "a comprehensive collection of inorganic materials, produced in a standardized format that can be rapidly searched for unknown phase identification. Extensive data mining is facilitated with our 116 display fields coupled with >60 searches." 

The International Centre for Diffraction Data (ICDD) provides an extensive set of tutorials to help you get the most out of PDF-4+'s searching and data mining capabilities.