A template ion exchange method has been established to synthesize ternary sulfides MIn2S4 (M = Mn, Zn) by the reaction of metal chlorides and NaInS2 in absolute ethanol at 140 degreesC for 12 h. The effects of reactant NaInS2, temperature and reaction time on the template ion exchange reaction were investigated. (C) 2004 Published by Elsevier Ltd.