  The phase diagram of cold dense quark matter is studied using the 't Hooft
extended Nambu--Jona-Lasinio Model applied to the light quark sector with a
finite current mass for the strange quark (up and down are considered in the
chiral limit). By relaxing the traditional uniformity assumptions and
considering a modulated light quark condensate background we investigate the
possible existence of non-uniform phases in this region of the phase diagram.
The effects of changes in the coupling strengths of the model are studied and
it is shown that the inclusion of flavour mixing combined with the finite
current mass of the strange quark catalyses the appearance of the non-uniform
phases, extending the domain for their existence.
