Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Adiabatic compressibility along the two-phase saturation line for the molten (LiF + CsCl) system

Stepanov, Victor P.
J. Chem. Thermodyn. 2019, 138, 345-349
ABSTRACT
The adiabatic compressibility, beta, of the immiscible liquid mixture (LiF + CsCl) along the saturation line was experimentally investigated in the temperature range from the melting point to the critical mixing temperature using sound velocity values, u, measured by the pulse method, and density quantities, rho, determined using the hydrostatic weight procedure based on the relationship beta = u-2rho-1. The coefficients of the temperature dependencies for the compressibility, sound velocity and density of the upper and lower equilibrium phases have opposite signs because of the superposition of the thermal motion intensity of the ions and the change in the phase compositions. The differences deltabeta, deltau and deltarho for the equilibrium phases decrease with temperature elevation. The temperature dependencies of the compressibility, sound velocity and density difference are described using the empirical equations deltabeta approx.= (Tc - T)1.004, deltau approx.= (Tc - T)1.003 and deltarho approx.= (Tc - T)0.504.
Compounds
# Formula Name
1 ClCs cesium chloride
2 FLi lithium fluoride
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Normal melting temperature, K ; Crystal
  • Crystal
  • Liquid
  • Air at 1 atmosphere
  • DTA
  • 1
  • POMD
  • 2
  • Normal melting temperature, K ; Crystal
  • Crystal
  • Liquid
  • Air at 1 atmosphere
  • DTA
  • 1
  • POMD
  • 1
  • 2
  • Upper consolute temperature, K ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Air at 1 atmosphere
  • From density and speed of sound meaurements
  • 1
  • POMD
  • 1
  • 2
  • Mass density, kg/m3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Buoyancy - hydrostatic balance
  • 10
  • POMD
  • 1
  • 2
  • Mass density, kg/m3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Buoyancy - hydrostatic balance
  • 10