Instability of the dielectric constant of Cd2Nb207
Smolenskii G. A. , Kolpakova N. N. , Kizhaev S. A.
An anomalous instability (over time) and an anomalous thermal hysteresis of the dielectric constant have been discovered in Cd2Nb207 in the temperature interval 40-80 K. The Cd2Nb207 may contain an incommensurate phase in the temperature interval 80 К T5 > T> T6 = 44 K.