Density and Ultrasonic Velocity of NaNO3-MNO3(M:Li,K,Rb,Cs) Binary Melts.

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The density and ultrasonic velocity of NaNO3-MNO3 (M: Li, K, Rb and Cs) binary melts have been measured by means of the manometric method and the pulse transmission method with precisions of ±0.2% and ±0.1%, respectively. The molar volume, isentropic and isothermal compressibilities have been determined from the experimental results. The molar volumes of NaNO3-LiNO3, NaNO3-KNO3 and NaNO3-RbNO3 binary melts show almost additive value, while that of NaNO3-CsNO3 binary melts deviates positively from the additivity. Both the isentropic and isothermal compressibilities of the binary melts deviate positively from the additivity by 1-2%. It has been concluded that the mixing of NaNO3 and MNO3 causes slight deviation from the ideal behavior in molar volume and compressibility.
日本熱物性学会の論文