Imperfections in the structure of cobalt II. Mathematical treatment of proposed structure

Author:

Abstract

The close-packed structures are made by piling up close-packed planes of atoms in three different relative positions. In proper hexagonal closepacking only two of the positions are used. The intensity of reflexion of X-rays is calculated for a structure which usually follows the hexagonal scheme, but has occasional faults introducing the third position. It is shown that this model gives a satisfactory explanation of the measured integral breadths of certain reflexions from hexagonal cobalt. The affected reflexions with l even are broadened more than those with l odd. The total intensity of the reflexions is not greatly changed. The frequency of faults in the specimen investigated by Edwards & Lipson is calculated, and is found to be, on the average, about one in every ten planes.

Publisher

The Royal Society

Subject

Pharmacology (medical)

Reference10 articles.

1. Proc. Roy;Edwards O. S.;Soc. A,1942

2. X-ray diffraction by finite and imperfect crystal lattices

3. Hendricks S. B. Jefferson M. E. & Shultz J. F. 1930 Kristallogr. 73 376.

4. Proc. Roy;Jones F. W.;Soc. A,1938

5. Proc. Roy;Jones F. W.;Soc. A,1938

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