Phyllosilicates commonly show rotations between adjacent layers involving n60° (where n is an integer from 1 to 6), and with registry or partial registry between layers. Stacking disorder or partial disorder involves the lack of regularity in the n value. Equivalence to this type of stacking order/disorder may be achieved also by random or partially random translations along the pseudohexagonal a or b axes (commonly along a, and very rarely along b) of the layer silicate.
See turbostratic stacking