Difference between revisions of "Substructure"
From Online Dictionary of Crystallography
(Created page with "<font color="blue">Sous-structure </font> (''Fr''). <font color="black">Sottostruttura </font> (''It''). <font color="purple">部分構造 </font> (''Ja''). A [[crystal structu...") |
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*[http://scripts.iucr.org/cgi-bin/paper?S1600576719000463 The confusion between lattice and structure explained] | *[http://scripts.iucr.org/cgi-bin/paper?S1600576719000463 The confusion between lattice and structure explained] | ||
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Revision as of 09:24, 17 February 2019
Sous-structure (Fr). Sottostruttura (It). 部分構造 (Ja).
A crystal structure is composed by a finite number N of crystallographic orbits. When N > 1, a subset N’ (1 ≤ N’ < N) of the crystallographic orbits of S defines a substructure.
In chemistry and material science literature a substructure is often but incorrectly called a sublattice. A lattice is a mathematical description of the periodicity of a crystal structure and does not possess atomic nature. Furthermore, the translation lattice built on the subset of atoms defining a substructure can either coincide with the lattice of the original structure or be a superlattice of it, but never a sublattice.