Accession Number:

AD0681280

Title:

ON THE PROBLEM OF TABULAR REDUCTION OF CRYSTAL CHEMICAL INFORMATION: METALS AND SEMICONDUCTORS,

Descriptive Note:

Corporate Author:

NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF PURE PHYSICS

Personal Author(s):

Report Date:

1968-04-27

Pagination or Media Count:

35.0

Abstract:

Difficulties are emphasized of bearing in mind the great amount of crystal chemical information now existing, and using it in order to select materials most likely to provide desired electrical, magnetic or other physical properties. Regarding structures as formed by the stacking of layer networks of atoms, a tabular reduction of structural information on atomic arrangement of 220 of some 475 known structure types of metals and semiconductors is presented which covers 13 pages. Structural details can be regenerated from the rather simple coded symbols used, and comparison of structure types or determination of atomic coordination can be made directly with the coded forms without regenerating the whole structures. A further way of relating structural details is proposed by systematically considering the connections between tetrahedra, octahedra and right-trigonal prisms, the latter being taken as an example. The paper also gives a nomenclature for crystallographically identifying structure types named after a characteristic phase or compound. This combines two symbols naming the Bravais lattice with the number of atoms in the crystallographic unit cell. Author

Subject Categories:

  • Metallurgy and Metallography
  • Crystallography
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE