M. Mouallembahout et al., SYNTHESIS, CRYSTAL-STRUCTURE AND PHYSICAL-PROPERTIES OF NEW QUATERNARY SULFIDES WITH THE BACU2S2-TYPE, European journal of solid state and inorganic chemistry, 33(5), 1996, pp. 483-493
New significant examples of layered metal chalcogenide materials with
the tetragonal ThCr2Si2 type structure (S.G. 14/mmm), Ba(1-x)M(x)Cu(2)
S(2) (M = K, x = 0.20; M = Rb, x = 0.15) and MCuMnS(2) (M = K, Rb) hav
e been synthetized and characterized. In contrast to the stoichiometri
c semiconducting parent compound BaCu2S2, these new compounds exhibit
metallic properties which are explained in terms of band structure. A
new isostructural compound Rb2Cu3FeS4 is also mentioned.