Accession Number : ADD095342

Title :   Space Groups and Lattice Complexes.

Descriptive Note : Final rept.,

Corporate Author : NATIONAL STANDARD REFERENCE DATA SYSTEM

Personal Author(s) : Fisher, Werner ; Burzlaff, Hans ; Hellner, Erwin ; Donnay, J D H

Report Date : May 1973

Pagination or Media Count : 180

Abstract : The lattice complex is to the space group what the site set is to the point group - an assemblage of symmetry-related equivalent points. The symbolism introduced by Carl Hermann has been revised and extended. A total of 402 lattice complexes are derived from 67 Weissenberg complexes. The Tables list site sets and lattice complexes in standard and alternate representations. They answer the following questions: What are the co-ordinates of the points in a given lattice complex? In which space groups can a given lattice complex occur? What are the lattice complexes that can occur in a given space group? The higher the symmetry of the crystal structures is, the more useful the lattice-complex approach should be on the road to the ultimate goal of their classification. (Author)

Descriptors :   *CRYSTAL STRUCTURE, *CRYSTAL LATTICES, *COMPLEX COMPOUNDS, SYMMETRY, STANDARDS, CLASSIFICATION, TABLES(DATA), CRYSTALLOGRAPHY

Subject Categories : Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE