ABSTRACT

Fragments of M(CH3SO3)2-H2O (M = Zn,Cu) phase diagrams from subsolidus temperatures up to 70 deg.C (343.15 K) were obtained. Melting parameters of anhydrous zinc methanesulfonate (Tm = 566.2 +- 0.3 K, deltamH = 33.4 +- 0.6 kJ/mol) were clarified. New dodecahydrate zinc methanesulfonate and octahydrate copper methanesulfonate were revealed and characterized. Space group (R-3), lattice parameters (a = 9.1711(2), c = 21.4910(5)) and structure of Zn(CH3SO3)2*12H2O were determined. The dodecahydrate melts congruently at Tm = 299.4 +- 0.1 K, with the enthalpy of fusion deltamH = 78.9 +- 0.1 kJ/mol. The octahydrate Cu(CH3SO3)2*8H2O melts incongruently at 254.9 +- 0.1 K.

Compounds

#	Formula	Name
1	C2H30O18S2Zn	zinc(II) methanesulfonate dodecahydrate
2	H2O	water
3	C2H6O6S2Zn	zinc(II) methanesulfonate
4	C2H6CuO6S2	copper(II) methanesulfonate

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	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal		Crystal	X-ray diffraction	1
POMD	1	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	1	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	3	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	3	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	3 2	Eutectic temperature, K ; Liquid			Liquid Crystal - 2 Crystal of intercomponent compound 1 Air at 1 atmosphere	DTA	1
POMD	3 2	Eutectic temperature, K ; Liquid			Liquid Crystal of intercomponent compound 1 Crystal of intercomponent compound 2 Air at 1 atmosphere	DTA	1
POMD	3 2	Mass fraction - 3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	Titration method	8
POMD	3 2	Mass fraction - 3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 2	Titration method	8
POMD	3 2	Solid-liquid equilibrium temperature, K ; Liquid	Mass fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	DTA	5
POMD	3 2	Solid-liquid equilibrium temperature, K ; Liquid	Mass fraction - 3; Liquid Pressure, kPa; Liquid		Liquid Crystal of intercomponent compound 1	DTA	1
POMD	3 2	Solid-liquid equilibrium temperature, K ; Liquid	Mass fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 2	DTA	2
POMD	3 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	11
POMD	4 2	Eutectic temperature, K ; Liquid			Liquid Crystal - 2 Crystal of intercomponent compound 2 Air at 1 atmosphere	DTA	1
POMD	4 2	Peritectic temperature, K ; Liquid			Liquid Crystal of intercomponent compound 1 Crystal of intercomponent compound 2 Air at 1 atmosphere	DTA	1
POMD	4 2	Mass fraction - 4 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	Titration method	11
POMD	4 2	Solid-liquid equilibrium temperature, K ; Liquid	Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	DTA	6
POMD	4 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	12

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Solid-liquid phase equilibrium in the water-Zn(II) methanesulfonate and water-Cu(II) methanesulfonate systems

Belova, Ekaterina V., Krasnov, Vladimir S., Ilyukhin, Andrey B., Uspenskaya, Irina A.

ABSTRACT