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Shelomo I. Ben-Abraham

What is a crystal?

In April 1991 the Commission on Aperiodic Crystals [1] adopted the following definition of a crystal:
“[In the following] by 'crystal' we mean any solid having an essentially discrete diffraction diagram, [and by 'aperiodic crystal′ we mean any crystal in which three-dimensional lattice periodicity can be considered to be absent.]”
This definition has, in my opinion, two flaws. ...

Zeitschrift für Kristallographie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0044-2968
Volume: 222, 06/2007
Pages: 310

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