A geometrical notation for stacking faults in close-packed structures

Abstract

A new geometrical notation based on the use of intrinsic-extrinsic classification in conjunction with the concept of assigning subscripts to close-packed layers with different environments is proposed. The terms intrinsic and extrinsic have been used in a purely geometrical sense and are not linked with specific formation processes for stacking faults. It is shown that the proposed notation can provide a very compact and unique way of representing fault configurations in all close-packed structures, including the long-period polytypes.