Crystal structure of the ternary compound GdAg2Ge2

Abstract

Four ternary compounds, GdAg₂Ge₂, ~GdAgGe₃, Gd₃Ag₄Ge₄, and GdAgGe, were observed in the Gd–Ag–Ge system at 500 °C [1]. Later [2] the existence of two more compounds: Gd₂AgGe₆ and GdAg_0.6Ge_1.4, was reported at 600 °C in the same system. For the compound GdAgGe a complete structure determination was performed [3], whereas for the compounds Gd₃Ag₄Ge₄, Gd₂AgGe₆, and GdAg_0.6Ge_1.4 cell parameters were determined and structure types were assigned [1,4]. For the compound ~GdAgGe₃ orthorhombic cell parameters were reported [1], whereas for the compound GdAg₂Ge₂ the structure type CeAl₂Ga₂ was assigned [1]. The aim of the present work was to confirm the existence of the ternary compounds GdAg₂Ge₂ and ~GdAgGe₃ at 600 °C and refine their crystal structures.