Properties of Uranium(V) in Hydrofluoric Acid Solution; the New Compounds HUF6.2.5H2O and HUF6.1.25H2O

1964 ◽  
Vol 3 (5) ◽  
pp. 727-729 ◽  
Author(s):  
L. B. Asprey ◽  
R. A. Penneman
Keyword(s):  
Acid Solution ◽  
Hydrofluoric Acid ◽  
Hydrofluoric Acid Solution ◽  
New Compounds

Enthalpic analysis of the CaTiSiO5 system

2006 ◽  
Vol 60 (4) ◽  
Author(s):  
I. Nerád ◽  
L. Kosa ◽  
E. Mikšíková ◽  
K. Adamkovičová
Keyword(s):  
Experimental Data ◽  
Acid Solution ◽  
Hydrofluoric Acid ◽  
Solution Calorimetry ◽  
Enthalpy Of Fusion ◽  
Drop Calorimetry ◽  
Enthalpies Of Solution ◽  
Hydrofluoric Acid Solution ◽  
Relative Enthalpy

AbstractThe relative enthalpy of titanite and enthalpy of CaTiSiO5 melt have been measured using drop calorimetry between 823 K and 1843 K. Enthalpies of solution of titanite and CaTiSiO5 glass have been measured by the use of hydrofluoric acid solution calorimetry at 298 K. Enthalpy of vitrification at 298 K, δvitr H(298 K) = (80.7 ± 3.4) kJ mol−1, and enthalpy of fusion at the temperature of fusion 1656 K, δfus H(1656 K) = (139 ± 3) kJ mol−1, of titanite have been determined from experimental data. The obtained enthalpy of fusion is considerably higher than up to the present published values of this quantity.

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