<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The title compounds are prepared by high‐frequency melting of the elements (Nb ampules, 1100 K, 4 h) and characterized by powder XRD, <sup>119</sup>Sn and <sup>151</sup>Eu Moessbauer spectroscopy, and magnetic measurements.</p> </abstract>