TY - JOUR
T1 - Thermodynamic properties of uranyl minerals
T2 - Constraints from calorimetry and solubility measurements
AU - Shvareva, Tatiana Y.
AU - Fein, Jeremy B.
AU - Navrotsky, Alexandra
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/1/18
Y1 - 2012/1/18
N2 - More than 50 uranyl minerals, phases containing U 6+ as the uranyl UO 2 2+ cation, and hydroxide, carbonate, phosphate, and silicate anions, H 2O, and alkali and alkaline earth cations, occur in nature and as corrosion products of spent nuclear fuel. Despite their importance and the need to understand their thermodynamics to predict uraniumsolubility, fate, and transport in the environment, reliable thermodynamic data have only been available recently. This paper summarizes recent studies of enthalpies of formation using high temperature oxide melt solution calorimetry and Gibbs free energies from solubility experiments. Standard state thermochemical parameters (at 25°C and 1 bar) are tabulated and the stability and transformation sequences of these phases are discussed. The enthalpies of formation from oxides are discussed in terms of crystal structure and Lewis acid-base interactions.
AB - More than 50 uranyl minerals, phases containing U 6+ as the uranyl UO 2 2+ cation, and hydroxide, carbonate, phosphate, and silicate anions, H 2O, and alkali and alkaline earth cations, occur in nature and as corrosion products of spent nuclear fuel. Despite their importance and the need to understand their thermodynamics to predict uraniumsolubility, fate, and transport in the environment, reliable thermodynamic data have only been available recently. This paper summarizes recent studies of enthalpies of formation using high temperature oxide melt solution calorimetry and Gibbs free energies from solubility experiments. Standard state thermochemical parameters (at 25°C and 1 bar) are tabulated and the stability and transformation sequences of these phases are discussed. The enthalpies of formation from oxides are discussed in terms of crystal structure and Lewis acid-base interactions.
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U2 - 10.1021/ie2002582
DO - 10.1021/ie2002582
M3 - Article
AN - SCOPUS:84860153038
SN - 0888-5885
VL - 51
SP - 607
EP - 613
JO - Industrial & Engineering Chemistry Research
JF - Industrial & Engineering Chemistry Research
IS - 2
ER -