We explore theoretically the possibility of austenite-martensite transforma
tions more complicated than those envisaged by the crystallographic theory,
and make corresponding experimental predictions. The use of the Hadamard j
ump condition in this context is justified, and leads also to results on no
n-attainment of minimum energy. (C) 1999 Elsevier Science S.A. All rights r
eserved.