A generalized crystallography
نویسندگان
چکیده
منابع مشابه
A Focus on Crystallography
The assignment of atom types is one of the first stepsafter solving a single crystal X-ray structure analysis. It isoften difficult or even impossible to assign correct atomtypes if there are atoms with similar atomic number pres-ent in the structure solution. The Cambridge StructuralDatabase (CSD) allows to perform statistical analysesof bond lengths and delivers an ele...
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The definition of an extended crystallographic group is given, based on an n-dimensional Euclidean space, carrier of a faithful integral representation of a permutation group of atomic positions. The Euclidean crystallography of normal crystals and the higher-dimensional one applied to incommensurately modulated crystals, intergrowth crystals and quasicrystals are special cases of a general cry...
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In a circle (an S 1) with circumference 1 assume m objects distributed pseudo-randomly. In the univeral covering manifold R 1 assume the objects replicated accordingly , and take an interval L > 1. In this interval, make the normalized his-togram of the pair separations which are not an integer. The theoretical (expected) such histogram is obtained in this report, as well as its difference to a...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations of Crystallography
سال: 1987
ISSN: 0108-7673
DOI: 10.1107/s0108767387076864