The processes of hydrothermal synthesis, which have been described in the first paper of this series, have been extended to metal and non-metal tellurides, prepared from mixtures of oxides and tellurium powder. The already studied reaction for selenides,consisting of a concurrent action of sulphur and base, quantitatively leading to metal or non-metal telluride and to alkali sulphate, have been particularly applied. Complex tellurides as AgInTe₂ and CuInTe₂ were also obtained. The same process may be realized when sulphur is replaced by organic reducing agents such as alkali formates.