International Tables for Crystallography

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You have followed a link to material from the 2012 edition of International Tables for Crystallography Volume F. If you would like to update your licence to include this material please contact support@iucr.org. If you have a licence for the 2006 edition of this volume please follow the link below to access material from it:

International Tables for Crystallography (2006). Vol. F, Table 5.2.6.2
Crystal-density measurements
E. M. Westbrook. International Tables for Crystallography (2012). Vol. F, ch. 5.2, pp. 152-157  [ doi:10.1107/97809553602060000817 ]

Abstract

Crystal-density measurements may be necessary to define a crystal's molecular-packing arrangement, particularly when a crystal has an unusual packing density (very dense or very open); when there are a large number of subunits in the crystallographic asymmetric unit; when the structure consists of heterogeneous subunits, so the molecular symmetry or packing is uncertain; and for crystals of nucleic acids, nucleic acid/protein complexes and viruses. Topics covered in this chapter include: solvent in macromolecular crystals; the Matthews number; algebraic concepts related to crystal density; experimental estimation of hydration; and methods for measuring crystal denisty. A discussion of how to handle solvent density is also given.


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About International Tables for Crystallography

International Tables for Crystallography is the definitive resource and reference work for crystallography. The multi-volume series comprises articles and tables of data relevant to crystallographic research and to applications of crystallographic methods in all sciences concerned with the structure and properties of materials.