Comparative thermodynamic evaluation of the reactivity of beryllium silicates and lithium silicates to facilitate their processing
| Autor: | N. A. Kulenova, R. K. Kapasova, A. N. Borsuk, V. I. Zelenin, V. I. Samoilov |
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| Rok vydání: | 2009 |
| Předmět: |
Euclase
Chemistry Inorganic chemistry Metals and Alloys Analytical chemistry Bertrandite chemistry.chemical_element Condensed Matter Physics Decomposition Silicate Gibbs free energy symbols.namesake chemistry.chemical_compound Mechanics of Materials Materials Chemistry symbols Lithium Reactivity (chemistry) Beryllium |
| Zdroj: | Metallurgist. 53:766-770 |
| ISSN: | 1573-8892 0026-0894 |
| DOI: | 10.1007/s11015-010-9246-9 |
| Popis: | Calculations and comparisons of average values of the standard Gibbs free energy for the formation of beryllium silicates are used to expand a known series that orders them by decreasing activity. The series is expanded to also include huegiant, barillite, spherobertrandite, eudidymite, beryllite, and chkalovite: chkalovite > beryllite > eudidymite > danalite > spherobertrandite > genthelvine > helvine > bertrandite > euclase > barillite > phenacite > beryl > huegiant. It is recommended that phenacite and the members to the left of it in the thermodynamically expanded series of silicate be used for direct sulfation, by-passing the expensive decomposition stage. Results obtained from calculation and comparison of average values of the standard Gibbs free energy of lithium silicates are used to construct another thermodynamically substantiated series that orders these minerals in decreasing order of reactivity: kuckite > bickitait > polylitionite > eucryptite > tainiolite = spudomen. |
| Databáze: | OpenAIRE |
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