Les intercalaires Ax Ti S2 et Ax Zr S2. Structure et liaisons. (A = Li, Na, K, Rb, Cs)

A general survey of alkali metals intercalation compounds with titanium and zirconium disulfides is given. A model A+x (Ti S2x− or A+ (Zr S2)x− with an electronic delocalization in the (Ti2S2) or (Zr S2) slabs, is suggested according to crystallographic and magnetic studies, N.M.R. measurements, and chemical behaviour. The alkali metal coordination is related to several factors: size of the A+ ion, value of the x parameter, strength of the T.S. bonds.