Table 3: Estimated dipole moment of TaO6 octahedron of the ferroelectric phase at 300 K (A21am) and the high-temperature paraelectric phase (I4/mmm) at 1000 K [25].

A21am I4/mmm    Present study Miura [34] Shimakawa et al. [35] Rae et al. [36] Present study 0.035 0.564 0.425 0.386 0 −0.702 −0.074 0.001 0.003 0 1.528 1.747 1.169 1.117 1.365 1.682 1.837 1.244 1.182 1.365