Dodecagonal quasicrystal in a polymeric alloy We report the formation of an approximant of a dodecagonal quasicrystal in a quasitwodimensional lattice Monte Carlo simulation of a starshaped three component polymeric alloy. It is associated with the recent striking experimental manifestation of the complex Archimedean tiling (3^{2}.4.3.4) consisting of triangles and squares, related to the $\sigma$ phase in the FrankKasper family, but whose edge length is about 80 nm. The simulation box with periodic boundary conditions (128*128*10) can be regarded as the Stampfli inflation of the (3^{2}.4.3.4) tiling, an approximant of the dodecagonal quasicrystal. The corresponding edge length of deflated squares and triangles is thought to be about 300 nm. Furthermore, the phason dynamics of the deflated squaretriangle tiling is observed at an elevated temperature. 
