On the Ferroelectric Phase of Lead Orthovanadate Pb3(VO4)2 Crystal
1991 年 60 巻 4 号 p. 1169-1172
詳細
1991 年 60 巻 4 号 p. 1169-1172
X-ray scattering experiments of Pb3(VO4)2 using a monodomain crystal were carried out above and below the ferroelectric transition temperature TC=273 K. The space groups were confirmed to be C2h5-P21⁄c and C23-A2 above and below TC, respectively. The ferroelastic and ferroelectric phase transitions with decreasing temperature are due to the instabilities at the F-point and the Γ-point, respectively, of the high-temperature trigonal phase.
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