Table 1: Synthesis conditions of α-BiTaO4 by the flux method.

Run no.Bi2O3 : B2O3Fluxa : Ta2O5 Reaction temperature/°C
(molar ratio)(molar ratio)

138 : 6230 : 7750
238 : 6230 : 7800
338 : 6230 : 7900
438 : 62 30 : 0.5750
538 : 6230 : 2750
638 : 6230 : 4750
738 : 6230 : 9750

aFlux = Bi2O3 + B2O3.