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Crystallographic curiosities: polymorphism and structures with Z' > 1

Lookup NU author(s): Emeritus Professor Bill CleggORCiD



This is the authors' accepted manuscript of an article that has been published in its final definitive form by International Union of Crystallography. Published by John Wiley & Sons Ltd, 2019.

For re-use rights please refer to the publisher's terms and conditions.


Polymorphs often have different values of Z', the number of independent molecules in the asymmetric unit of the crystal structure. Structures with Z' > 1 are a small minority, particularly so for Z' >2, and many are associated with packing problems, disorder and weak intermolecular interactions. These phenomena are fascinating and have important practical implications.

Publication metadata

Author(s): Clegg W

Publication type: Article

Publication status: Published

Journal: Acta Crystallographica. Section C: Structural Chemistry

Year: 2019

Volume: 75

Issue: Part 7

Pages: 833-834

Online publication date: 01/07/2019

Acceptance date: 20/06/2019

Date deposited: 21/06/2019

ISSN (electronic): 2053-2296

Publisher: International Union of Crystallography. Published by John Wiley & Sons Ltd


DOI: 10.1107/S2053229619008799


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