<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The new series of title compounds (x = 0, 0.1, 0.2, 0.3, 0.4) is synthesized by solid state reaction of stoichiometric mixtures of Nd<sub>2</sub>O<sub>3</sub>, Fe, Se, and S powders (evacuated quartz tubes, 1273 K, 48 h).</p> </abstract>