DOIAbstract
Misfit layer chalcogenides (MX)(1+x)(TX(2))(m) (M=Sn, Pb, Sb, Bi, rare earth; T=Ti, V, Cr, Nb, Ta; X=S, Se; 0.08 <x <0.28; m = 1, 2, 3) result from an alternate stacking of MX and TX, slabs. Both sublattices have two a and b in-plane parameters; the ratio of the a parameters is irrational. The structural features associated with these planar intergrowth compounds are described. Multilayered misfit compounds (m = 2, 3) show various polytypes. Non-stoichiometry can occur in MX layers related to vacancies of M atoms (MX sublattice). The physical properties are discussed in detail. Superconductivity is observed in some series and can be studied as a function of m, the number of superconducting TX(2) slabs, such as NbSe2, that can stack one on t...
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