Every crystallographer knows that, in the hexagonal four-index symbol referred to the Bravais axes, the sum of the first three indices is zero. This is why one of these indices, usually the third one, is often omitted altogether and replaced by a period. The general form is then symbolized {hk.l}. The period stands for – (h+k).

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not currently have access to this article.