PDF-4/Minerals 2020 is the most comprehensive collection of mineral data in the world! Ninety-seven percent of all known mineral types, as defined by the International Mineralogical Association (IMA), are represented in the database, as well as many unclassified minerals. There is a very wide selection of chemical variants within mineral species as shown by the 22,195 unique empirical formulas in the collection. Our database demonstrates the benefit of having combined data from several different databases.
Due to focused editorial efforts in bibliographic searching, editorial review, and classification, the mineral collection has grown by over 50% during the last 10 years to 47,000+ entries in release 2020. All data are statistically analyzed, then peer-reviewed by an editorial task group of ICDD scientist members, who are also mineralogists. Minerals are classified by IMA designations of family, class and subclasses, Pearson symbols, and prototype structures. All mineralogical zeolites are similarly classified using international Zeolite Association guidelines.