ABSTRACT

The phase diagram of the quasi binary NaBr DyBr3 system was determined by differential thermal analysis (DTA) applied to 27 samples covering the complete composition range of the system. The 3NaBr*DyBr3(s) compound is present in the solid-phase in addition to the pure component halides NaBr(s) and DyBr3(s). The DyBr3(s) and 3NaBr*DyBr3(s) phases showed a polymorphic transition at 1112 and at 733 K, respectively. The {DyBr3(s) + 3NaBr*DyBr3(s)} eutectic mixture melts at 709K giving a liquid of the molar composition x(NaBr) = 0.62. The 3NaBr*DyBr3(s) phase melts peritectically at 765 K. The phase diagram obtained in the present study virtually agrees with the calculated one available in literature.

Compounds

#	Formula	Name
1	BrNa	sodium bromide
2	Br3Dy	dysprosium bromide (DyBr3)
3	Br6DyNa3	trisodium hexabromodysprosiumate

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	Triple point temperature, K ; Crystal 2			Crystal 2 Crystal 1 Air at 1 atmosphere	DTA:FP	1
POMD	3	Triple point temperature, K ; Crystal 2			Crystal 2 Crystal 1 Air at 1 atmosphere	DTA:FP	1
POMD	1 2	Eutectic temperature, K ; Liquid			Liquid Crystal - 1 Crystal - 2 Air at 1 atmosphere	DTA	1
POMD	1 2	Eutectic composition: mole fraction - 1 ; Liquid			Liquid Crystal - 1 Crystal - 2 Air at 1 atmosphere	DTA	1
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	DTA	9
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	DTA	10
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid		Mole fraction - 1; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	DTA	2
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	DTA	7
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	DTA	11

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Study of the NaBr DyBr3 phase diagram by differential thermal analysis

Kobertz, D., Miller, M., Niemann, U., Singheiser, L., Hilpert, K.

ABSTRACT