  From a linear stability analysis of the Gross Pitaevskii equation for binary
Bose Einstein condensates, it is found that the uniform state becomes unstable
to a periodic perturbation of wave number k if k exceeds a critical value kc.
However we find that a stationary spatially periodic state does not exist. We
show the existence of pulse type solutions, when the pulse structure for one
condensate is strongly influenced by the presence of the other condensate.
