Synthesis, Structure, and Characterization of the Series BaBi1−xTaxO₃ (0 ≤ x ≤ 0.5)

The series BaBi(1-x)Ta(x)O(3) (0 <or= x <or= 0.5) has been synthesized by traditional solid-state reactions. Their structures are analyzed by the combinational use of X-ray, neutron, and converged-beam electron diffractions. They all crystallize in P1. FTIR and Raman data confirm that an inversion center is absent in the crystal structure of the series BaBi(1-x)Ta(x)O(3) (0 <or= x <or= 0.5). No obvious P-E (polarization-electrical field) loops are observed for them.