  We calculate the mass and residue of the heavy spin--1/2 baryons containing
two heavy b or c quarks in the framework of QCD sum rules. We use the most
general form of the interpolating current in its symmetric and anti-symmetric
forms with respect to the exchange of heavy quarks, to calculate the two-point
correlation functions describing the baryons under consideration. A comparison
of the obtained results with existing predictions from various approaches is
also made.
