Le groupe P1 et ses sous-groupes. IV. Traitement systematique de la conservation reticulaire
Abstract
The present paper is the continuation of another devoted to the theoretical aspects of lattice-row and lattice-plane preservation in the isomorphic subgroups of space group P1. In the present paper the lattice preservation is studied as a function of the values of row indices U,V,W and plane indices (H,K,L) via the diagonalization of the change matrix defining the subgroup. The diagonalization is carried out by means of the program MONIC (Fortran IV, 220 instructions). Practical results are given for the case of isomorphic subgroups of index 8.