Thermodynamics Research Center / ThermoML | Thermochimica Acta

Studies on the phase diagram of CaCl2-CaBr2 system

Ghosh, S.[Sajal], Sridharan, R., Gnanasekaran, T.
Thermochim. Acta 2010, 505, 1-2, 69-72
ABSTRACT
A study on pseudo-binary CaCl2-CaBr2 system was carried out using Differential Thermal Analysis (DTA) technique covering the complete composition range of the constituents between room temperature and 1073 K. From the DTA results the contour of solidus and liquidus temperatures with composition was plotted and the phase diagram of CaCl2-CaBr2 system was constructed. The solidus and liquidus curves exhibit a minimum at 971 K and at a composition of 56.5 mol% CaBr2. Below 971 K, the system exhibits complete solid solution. Long term equilibration of samples of several compositions was carried out at 923 K and 673 K and the phases were characterized by XRD. The DTA data are supported by the XRD results which confirm the constructed phase diagram of CaCl2-CaBr2 system.
Compounds
# Formula Name
1 CaCl2 calcium chloride
2 Br2Ca calcium bromide
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
  • 1
  • Mass density, kg/m3 ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • X-ray diffraction
  • 1
  • POMD
  • 2
  • Normal melting temperature, K ; Crystal
  • Crystal
  • Liquid
  • Air at 1 atmosphere
  • DTA
  • 1
  • POMD
  • 2
  • Mass density, kg/m3 ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • X-ray diffraction
  • 1
  • POMD
  • 2
  • 1
  • Solid-liquid equilibrium temperature, K ; Crystal
  • Mole fraction - 1; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Liquid
  • DTA
  • 21
  • POMD
  • 2
  • 1
  • Solid-liquid equilibrium temperature, K ; Liquid
  • Mole fraction - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal
  • DTA
  • 13
  • POMD
  • 2
  • 1
  • Mass density, kg/m3 ; Crystal
  • Mole fraction - 2; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • X-ray diffraction
  • 8