<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Ge<sub>129.3</sub>P<sub>42.7</sub>Te<sub>21.53</sub> is prepared by solid state reaction of a stoichiometric mixture of GeP, Ge, and Te (sealed silica tubes, 953 K, 72 h, further annealing in the presence of phosphorus at 873 K, 120 h, ≈1 bar P partial pressure).</p> </abstract>