Interaction of Vanadium with Iron and Antimony at 870 and 1070 K

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<jats:title>Abstract</jats:title><jats:p>The isothermal sections of the phase diagram of the V–Fe–Sb ternary system have been constructed at 870 and 1070 K by means of X‐ray and electron‐probe microanalyzer (EPMA) analyses over the whole concentration range. The existence of the one ternary phase, VFeSb, with MgAgAs‐ and Ni<jats:sub>2</jats:sub>In‐type structures was observed at 870 and 1070 K, respectively. The solid solution formed based on the binary Fe<jats:sub>2–<jats:italic>x</jats:italic></jats:sub>Sb (Ni<jats:sub>2</jats:sub>In‐type) compound reaches up to 12 at.‐% of V at 870 K and 40 at.‐% at 1070 K, respectively. Differential scanning calorimetry (DSC) analysis, magnetic susceptibility measurements, and electronic structure calculations showed the absence of a VFeSb polymorph phase transition and indicate that the hexagonal phase is part of the V<jats:italic><jats:sub>y</jats:sub></jats:italic>Fe<jats:sub>2–<jats:italic>x</jats:italic></jats:sub>Sb solid solution.</jats:p>

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