The equilibrium orientation of Pt in contact with (100)-SrTiO3, at 1050 A degrees C and in an Ar/2 % O-2 environment, was determined by solid-state dewetting of continuous Pt films on single crystal SrTiO3 substrates. Given the similar lattice parameters between Pt and SrTiO3, a simple cube-on-cube orientation relationship was expected to form at equilibrium. However, only a preferred orientation of Pt {111} parallel to the SrTiO3 (100) surface formed, without a low-index orientation relationship. It was found that reconstruction of the SrTiO3 surface (a complexion) was responsible for the Pt particle texture. The equilibrium crystal shape of the Pt particles was analyzed and it was found to contain the following facets: {111}, {100}, {110}, and {113}.