  With a view to exploring a new kind of phase transition in the process of
hadronization of quark-gluon plasma (QGP) we investigate the occurrence of
pentaquark baryons and tetraquark mesons in the system. For this purpose, the
frame work of an analoguous Saha's ionization formula for the colored ions in
the system is used. The study of color-ionic-fraction (CIF) of multiply (color)
ionized to unionized quark clusters (termed as "quarkons") as a function of
temperature is carried out. It is pointed out that not only the temperature of
the fire-ball in the relativistic heavy ion collisions evolves with respect to
space and time but also the CIF associated with a particular stage of
ionization. Further, for the case of single color-ionization a correspondence
of the present results with those available for the bubble nucleation mechanism
in QGP is demonstrated.
