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Heat capacity measurements of K 3 Nb 3 O 6 (BO 3 ) 2 , a borate that exhibits superionic conductivity and ferroelectric properties, have been performed in the 60–220K temperature range. In this work, the presence of two heat capacity anomalies has been documented. The first anomaly occurs at 198.3K and it has been attributed to a first-order phase transition...
Heat capacity and dielectric properties of RbNbWO 6 were measured as a function of temperature. The heat capacity measurements revealed the presence of two discontinuous phase transitions at 356.5 and 361.6 K. The former transition was attributed to a transition from the low-temperature tetragonal ferroelectric phase to a phase of unknown symmetry, and the latter to a transition to the cubic...
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