Aperiodic crystals; from modulated phases to quasicrystals.9780198567776 Aperiodic a·pe·ri·od·ic adj. Not occurring periodically. a  pe·ri·od crystals; from modulated phases to quasicrystals.
Janssen, Ted et al. Oxford U. Press 2007 466 pages $150.00 Hardcover International union of crystallography The International Union of Crystallography (IUCr) is a member of the International Council for Science (ICSU) and exists to serve the world community of crystallographers. See also X-ray crystallography Crystallography External links QD921 The discovery of quasicrystals spurred interest because they show sharp diffraction spots and a rotation symmetry that is not crystallographic crys·tal·log·ra·phy n. The science of crystal structure and phenomena. crys tal·log in the sense of compatibility with lattice periodicity periodicity /pe·ri·o·dic·i·ty/ (per?e-ah-dis´i-te) recurrence at regular intervals of time. pe·ri·o·dic·i·ty n. 1. . Thus they are well ordered but aperiodic, meaning that standard techniques for the determination of their structures and physical properties, very often based on the presence of a Brillouin zone Brillouin zone In the propagation of any type of wave motion through a crystal lattice, the frequency is a periodic function of wave vector k . This function may be complicated by being multivalued; that is, it may have more than one branch. , are not applicable. New techniques were required for these determinations, spurring developments in chemistry, physics, crystallography, and even mathematics. In this work aimed at materials scientists, physicists, and crystallographers, Janssen (theoretical physics, U. of Nijmegen, the Netherlands), Chapuis (physics, Ecole Polytechnique Federale de Lausanne, France), and Boissieu (Laboratoire de Thermodynamique et Physico Chimie Metallurgique, France) provide a unified view of this now mature field, with applications in quasicrystals and modulated phases, assuming only a basic knowledge of solid state physics and crytallography. ([c]20072005 Book News, Inc., Portland, OR) |
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