Solid-solute phase equilibria in aqueous solution: Fundamentals and applications

2013 ◽  
Vol 85 (11) ◽  
pp. 2089-2095 ◽  
Author(s):  
Erich Königsberger
Keyword(s):  
Solid Solution ◽  
Aqueous Solution ◽  
Phase Equilibria ◽  
Solid Solutions ◽  
Thermodynamic Models ◽  
Equilibria In Aqueous Solution

The importance of solid-solution–aqueous-solution (SSAS) equilibria requires the incorporation of solid solutions into thermodynamic models for industrially and environmentally relevant applications. Insights from appropriate measurements and recent database developments have made such extensions feasible. Examples illustrating various types of stable and metastable equilibria involving solid solutions will be given.

THE EFFECT OF A FOREIGN SUBSTANCE ON THE TRANSITION: NH4NO3IVNH4NO3 III

1946 ◽  
Vol 24b (4) ◽  
pp. 93-108 ◽  
Author(s):  
Alan N. Campbell ◽  
A. Jean R. Campbell
Keyword(s):  
Solid Solution ◽  
Aqueous Solution ◽  
Ammonium Nitrate ◽  
Solid Solutions ◽  
Potassium Nitrate ◽  
Mixed Aqueous Solution ◽  
Foreign Substance

It is shown that the above transition can be repressed (metastably) by using in place of pure ammonium nitrate a solid solution of potassium nitrate in ammonium nitrate. With such a solid solution containing 8 to 10% potassium nitrate, the temperature of the transition III → IV is depressed to about −20 °C. Such solid solutions can be prepared either by fusing the components together or by crystallizing from a mixed aqueous solution.

scholarly journals Phase equilibria in the YFeO3 – YСoO3 system in air

2021 ◽  
Vol 8 (1) ◽  
pp. 20218108
Author(s):  
A. V. Bryuzgina ◽  
A. S. Urusova ◽  
I. L. Ivanov ◽  
V. A. Cherepanov
Keyword(s):  
Phase Diagram ◽  
Solid Solution ◽  
Phase Equilibria ◽  
Spin State ◽  
Solid Solutions ◽  
Homogeneity Range ◽  
Perovskite Structure ◽  
Single Phase ◽  
Decomposition Temperature ◽  
Unusual Behavior

YFe1-xСоxO3 solid solutions were prepared by glycerol-nitrate technique. The homogeneity range of solid solutions was studied within the temperature range 1173 – 1573 K. A continues series of solid solution below the decomposition temperature of YСоO3, which was shown to be equal to 1266 ± 6 K, begins to narrow at higher temperatures and becomes equal to 0 ≤ x ≤ 0.1 at 1573 K. The phase diagram of the YFeO3 – YСoO3 system in the “T – composition” coordinates was divided into three fields. Similar to the parent ternary oxides, all single-phase YFe1-xСоxO3 solid solutions possess orthorhombically distorted perovskite structure (Pnma space group). Unusual behavior of orthorhombic distortions in YFe1-xСоxO3 with temperature was explained by probable changes in spin state of Co3+ ions.

scholarly journals Absence of solid solution between Fe(II) and Mg(II) hydroxides and consequences on formation of fougerite and smectites

2019 ◽  
Vol 98 ◽  
pp. 04003
Author(s):  
Guilhem Bourrié ◽  
Jihaine Ben Nacib ◽  
Georges Ona-Nguema ◽  
Fabienne Trolard
Keyword(s):  
Solid Solution ◽  
Aqueous Solution ◽  
Solid Solutions ◽  
Electric Charge ◽  
Ionic Radii

As there exists extended solid solutions between ferrous and magnesian silicates, experiments were conducted to check if ferrous and magnesian hydroxides can co-precipitate in a solid solution. Results show that no solid solution forms and instead Fe(II) and Mg(II) hydroxides precipitate separately with the same solubilities as pure components. However, in fougerite, F(III), Fe(II) and Mg(II) coexist in a brucitic type hydroxide, with an extended solid solution. This implies that fougerite formation results from Fe(III) precipitation, Fe(III) being surrounded by divalent Fe(II) and Mg(II) to comply with the exclusion rule: Fe(III) ions cannot be direct neighbours. Consequently, Fe(III) - Fe(II) - Mg(II) smectites cannot form by oxidation of a ferrous magnesian brucitic layer, but by silication of fougerite. The impossibility of formation of a solid solution between Fe(II) hydroxide and Mg(II) hydroxide, while their electric charge and ionic radii are identical can be explained by the differences of electronegativities of the elements. Fe(II) and Mg(II) can dimerize separately in aqueous solution, but an heterodimer cannot form.

The Alkali Orthophosphates. Phase Equilibria in Aqueous Solution.

1954 ◽  
Vol 54 (6) ◽  
pp. 891-924 ◽  
Author(s):  
Bernard Wendrow ◽  
Kenneth A. Kobe
Keyword(s):  
Aqueous Solution ◽  
Phase Equilibria ◽  
Equilibria In Aqueous Solution
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