AbstractThe transport coefficients of a nonideal plasma are expressed by equilibrium correlation functions within the ZUBAREV approach. Besides the treatment of the different interactions in a partially ionized plasma, this approach allows also for the currents of the heavy particles ions and atoms. Furthermore, the influence of an arbitrary mass ratio on the transport coefficients is investigated. Explicit results are shown for H (n= 1017… 1020cm−3,T= (1…3) · 104K) and Cs plasma (n= 1015…1021cm−3,T= (3