The weight distribution coefficients (lambda(M)) of the most often occurring in zirconium salts ions (M(II), M(III) and M(IV)) have been determined in established earlier optimal conditions for separation of zirconium from hafnium by means of Diphonix (R) resin. Their values range from 21 (lambda(Zn(II))) to 1830 (lambda(Ti(IV))) and depend on the charge of M ion as well as on its radius. For ions of the highest lambda(M) (Ti(IV) and Fe(III)) their influence on hafnium - zirconium separation has been studied. Ti(IV) ions at concentration of 1% (in relation to Zr) has been found to noticeably affect separation of hafnium from zirconium by means of Diphonix (R) resin.