dislocation network in a sentence

1. If Mott only produced early and somewhat minor contributions to that field, notably on alloy hardening with Nabarro and on the topology of a dislocation network lowering the apparent elastic constants of a crystal, there is no doubt that Mott's enthusiasm played its role in the three major steps forward in the field by F . C . Frank on crystal growth and plasticity and later, in Cambridge, by P . Hirsch on the thin film electron microscopy.
2. It's difficult to find dislocation network in a sentence.