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Butanedioic acid, 2,3-dihydroxy- (2R,3R)-, potassium sodium salt, hydrate (1:1:1:4)


Phase change data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing

Temperature of phase transition

Ttrs (K) Initial Phase Final Phase Reference Comment
212.crystaline, IVcrystaline, IIIDey, Som, et al., 1993 
256.crystaline, IIIcrystaline, IIDey, Som, et al., 1993 
297.crystaline, IIcrystaline, IDey, Som, et al., 1993 

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
42.752328.78crystaline, IIcrystaline, IHicks and Hooley, 1938 

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
130.0328.78crystaline, IIcrystaline, IHicks and Hooley, 1938 

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Dey, Som, et al., 1993
Dey, P.K.; Som, K.K.; Chowdhury, K.R.; Sarkar, B.K.; Chaudhuri, B.K., Heat capacity anomalies in Rochelle salt (NaKC4H6O6x4H2O) studied with a conduction-type calorimeter, 1993, Phys. [all data]

Hicks and Hooley, 1938
Hicks, J.F.G., Jr.; Hooley, J.G., The heat capacity of potassium sodium tartrate tetrahydrate from 15 to 340°K, J. Am. Chem. Soc., 1938, 60, 2994-2997. [all data]


Notes

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