ИСТИНА

Among the aluminides, gallides and germanides of ruthenium and rare-earth (RE) elements of the beginning of the series (mainly Ce), compounds of the composition RE2RuX or close to it are known [1-3]. They do not form isostructural series, but crystallize in new structural types, exhibit interesting magnetic and electrically conductive properties at low temperatures. Intermetallic compounds with magnesium as the p element RE2RuMg (RE = Sc, Y, Er, Tm, Lu) with the structure derived from CsCl [4] are described in the literature. On the contrary, indides with the stoichiometric ratio of components RE2RuIn have not previously been detected with the RE of the beginning of the series. The gallides with the RE of the end of the RE series have not been studied, except for HoRu0.6Ga0.4 [5]. Therefore, in this work, attention is paid to the compounds RE2RuGa (RE = Er, Tm, Lu) and RE2RuIn (RE = Dy-Lu).