PHASE-EQUILIBRIA IN THE SM-(RU,RH)-(SI,GE) SYSTEMS AT 870 K

Physico-chemical analysis techniques, including X-ray phase analysis a nd electron probe X-ray analysis were employed in constructing the iso thermal cross-section of the phase diagrams Sm-{Ru,Rh}-{Si,Ge} systems at 870 K. The formation of the new ternary intermetallic compounds, S m2RuGe2, Sm2RhGe2 (structure type Zr2CoSi2); Sm3Ru2Si2, Sm3Rh2Si2, Sm3 Rh2Ge2 (structure type La3Ni2Ga2); SmRh5Si3, SmRh5Ge3 (structure type UCo5Si3); Sm2Ru3Si5 (structure type Sc2Fe3Si5); SmRu3Si2 (structure ty pe LaRu3Si2); SmRuSi3 (structure type BaAl4); Sm33Rh20Ge47 (structure type AlB2); Sm(25R)h(19)Ge(56) (structure type CeRh1-xGe2+x); Sm2RhGe6 (structure type Ce2CuGe6) and Sm62Ru28Ge10, SmRu3Si, Sm2RuSi2, Sm62Ru 10Si28, Sm33Rh50Si17, Sm16Rh68Si16, SmRh3Si6, Sm37Rh35Si28, Sm2RhSi2, Sm4Rh4Si, Sm33Rh53Ge14, SmRh2Ge, Sm18Rh64Ge18, SmRh3Ge6, were detected in Sm-(Ru,Rh)-(Si,Ge) systems. It was found that compound SmRuSi does not belong to the structure type PbFCl. Ternary compound SmRuGe was n ot found in Sm-Ru-Ge system at 870 K.