Researchers synthesized 34 candidate ternary alloys by arc melting in inert argon and, for most samples, annealing at 1000 °C for one week. Powder X‑ray diffraction and Rietveld refinement confirmed that three previously unreported compounds—GdPt₂Ge, TiPt₅Si, and ZrPt₅Si—formed in the predicted on‑hull crystal structures and that YCoSi₃ crystallized as a new orthorhombic Cmmm polymorph, 8 meV / atom above the expected I4mm structure.

The ternary targets were selected from three lists: (A) compositions within 100 meV / atom of the convex hull and lacking reported ternaries; (B) hull entries with all binary edges present and exactly one reported ternary; (C) Alexandria PBEsol hull entries with a predicted disorder probability below 0.2. Eight of the 34 targets (≈24 %) formed a single‑phase ordered compound or a high‑energy polymorph; the remaining 26 were multiphase, disordered, or dynamically unstable.

Figure 1 shows the XRD patterns for GdPt₂Ge, TiPt₅Si, ZrPt₅Si, and YCoSi₃. The refinements match the predicted structures: GdPt₂Ge adopts the Pnma lattice (lowest‑energy in Alexandria), TiPt₅Si and ZrPt₅Si adopt the P4/mmm lattice, and YCoSi₃ adopts the Cmmm lattice. The annealing conditions were identical for all samples.