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PDF-4+ is the most comprehensive database designed for phase identification and quantitative analysis of inorganic materials.
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WebPDF-4+ provides portability of the PDF-4+ database via the Internet.
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PDF-2 is designed for phase identification of inorganic materials.
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PDF-4/Organics is a comprehensive database for phase identification combining both single crystal and powder diffraction data for organics and organometallics.
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PDF-4/Minerals is the most comprehensive collection of mineral data with nearly 97% of all known mineral types.
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Our Members

Approximately 300 scientists from around the world comprise the active membership from which the organization draws its Board of Directors, committees, and subcommittees. Our members, who are volunteers, are actively engaged in developments in the field of X-ray powder diffraction and related disciplines. Membership consists of scientists from various affiliations - educational, governmental, and industrial.