University of Oxford
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For many discrete-molecule materials, the molecules pack together to form crystals in a relatively simple way determined by the Space Group. Such materials are said to have Z'=1 (Z-prime). Increasingly, crystallographers are beginning to find crystals in which the basic building block is not just one molecule, but several molecules taken together. Such materials are said to have Z'>1.
[David Watkin | Keith Prout | X-ray diffraction suite | Z prime | Twins | Mogul ]
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