Thermodynamic properties of sodium pentatitanate (Na8Ti5O14)

The phase structure, thermodynamic properties, and dissolution behavior of Ca5Mg4V6O24

“…The molar C p of the Ca 5 Mg 4 V 6 O 24 at 298.15 K is equal to 374 J mol K −1 based on present measurements, and the entropy at 298.15 K is calculated to be 687.5 J mol K −1 . It should be noted that the temperature range of measurement in this study is 10–300 K, and the contribution to entropy below 10 K was calculated using Debye model, Debye temperature θ D can be obtained using the B 3 term in Equation () according to the relation θ D = (12 R π 4 /5 B 3 ) 1/3 43,44 . The entropy contribution using Debye model below 10 K is 0.1323 J mol −1 K −1 .…”

“…It should be noted that the temperature range of measurement in this study is 10-300 K, and the contribution to entropy below 10 K was calculated using Debye model, Debye temperature θ D can be obtained using the B 3 term in Equation ( 5) according to the relation θ D = (12Rπ 4 /5B 3 ) 1/3 . 43,44 The entropy contribution using Debye model below 10 K is 0.1323 J mol −1 K −1 . The molar C p of Ca 5 Mg 4 V 6 O 24 measured at a high temperature are plotted in Figure 5.…”