Considerations about the laws of twins

Abstract

Here I mean only what is meant by the word “twins”, and not those natural accretions that are caused by mechanical shifts - a case already discussed in my previous works. It seems to me that the experiments of the correct growth of dissimilar crystals on each other and the conclusions drawn from them by F. Barker completely establish the physical reason for the formation of twins. The most general conclusion from the principle is that the possibility of twinning growth along any plane of the complex, no matter how complex the symbol may be its expression, for cases of twinning faces with a complex symbol, is used in nature in exceptional circumstances.