Fault structures in rare earth-cobalt intermetallics

In dealing with materials which may undergo a shear (simple martensitic) transformation or which may contain planar compositional faulting, it is valuable to employ a stacking sequence notation, a structural symbolism which may be developed for any layer-like structure. The purpose of this paper is to present such a conventional notation, as far as possible consistent for all possible phases in rare earth-transition element systems ranging from RCo2 to R2Co17 and then to illustrate briefly application of this notation to shear transformations, shear structure development and the nature of homologous series of phases within such systems. (Auth.)