N. Ohno et al., STRUCTURAL ACENTRICITY IN PBHPO4 NEAR THE FERROELECTRIC TRANSITION INVESTIGATED BY RAMAN-SPECTROSCOPY, Journal of the Physical Society of Japan, 62(4), 1993, pp. 1093-1096
The effect of growth conditions on the structural acentricity in PbHPO
4 has been studied as a function of temperature from 295 to 365 K (T(C
)=310 K) by monitoring the intensities of several odd-parity Raman lin
es. Only a small acentricity was detected for temperatures just above
T(C), and the result was independent of sample growth temperature (abo
ve and below T(C)) and conditions.