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Upon use of a synthetic method reported earlier by us respective alloys of Na/Sn, Na/Ge and Na/Sb are dissolved in ethylenediamine and the title compounds precipitated from the solutions in high yield. By recrystallisation well shaped, stable crystals are obtained. The crystal structure of [Na4 · 7 en]Sn9 confirms the presence of a Sn9 4---polyhedron which had been suggested by us on the basis of other investigations. The Sn9 4--polyhedron may be described as a distorted tricapped trigonal prism. Ethylenediamine is coordinated to Na+-ions exclusively.