ИСТИНА

New ternary indides of approximate RE3RuIn3 composition were obtained by arc-melting during investigation of interaction of rare earths with ruthenium and indium. Compounds were studied by powder and single crystal XRD, and EMPA. Earlier, Ce11Ru4In9 of Nd11Pd4In9-type was structurally characterized. Tm, Yb, and Lu do not form ternaries of such stoichiometry. La, Pr, Nd, Sm, Gd, Tb, Dy, Ho, and Er indides were found to crystallize with four new structure types. Crystallographic data of the first representatives are listed in the Table. The structures are built of two types of layers stacking along the shortest axis and represent new members of intergrowth structures of CsCl- and AlB2-related slabs.