Stoichiometric amounts of 99.99% pure gadolinium and tellurium were taken in a quartz tube. The metals were melted at a temperature of 1500 ℃ under vacuum conditions and cooled by quenching to room temperature using Argon. Although the melting point of GdTe is 1825 ℃, a lower temperature was sufficient because the high vacuum conditions of 1 x 10 -5 mbar inside the furnace reduces the melting point of the metals and the compound. Hydrogen evolution reaction started immediately after contact with the atmosphere. Thus, the samples were stored under a vacuum.