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Figure 3
The percentage of polymorphs among all organic compounds in the CSD according to year for specific crystal types. Blue markers refer to the total number of polymorph entries/the total number of organic entries up until that time. Orange markers refer to the number of polymorph entries/the number of organic entries for that year only.

IUCrJ
Volume 5| Part 2| March 2018| Pages 124-129
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518000660