ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
On the knowledge of the System Na2O/Tl2O3. Na5TlO4, a New Oxothallat(III)Heating [Ag-cylinder, 620°C, 7d] a mixture of Na2O/Tl2O3 with Na : Tl = 5,4: 1, Na5TlO4 is formed as intensive yellow, coarse, orthorhombic single crystals, \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm a}\, = \,10.78_3 } & {{\rm b}\, = \,10.71_2 } & {{\rm c}\, = \,10.83_6 \,{\rm {\AA}}} & {{\rm Z}\, = \,8} \\ \end{array} $$\end{document} which are isotypic with Li5GaO4, parameter see text. The Madelung Part of Lattice Energy, MAPLE, the Mean Fictive Ionic Radii, MEFIR, Effectiv Coordination Numbers, ECoN, are calculated and discussed. Thermic decomposition yields yellow Na3TlO3 which was unknown before, and then red NaTlO2.
Notes:
Aus Gemengen Na2O/Tl2O3 mit Na : Tl = 5,4: 1 entsteht beim Tempern [Ag-Bömbchen, 620°C, 7d] Na5TlO4, in intensiv gelben, derben, orthorhombischen Einkristallen: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm a}\, = \,10,78_3 } & {{\rm b}\, = \,10,71_2 } & {{\rm c}\, = \,10,83_6 \,{\rm {\AA}}} & {{\rm Z}\, = \,8,} \\ \end{array} $$\end{document} die mit Li5GaO4 isotyp sind, Parameter siehe Text. Der Madelunganteil der Gitterenergie, MAPLE, die Mittleren Fiktiven Ionenradien, MEFIR, und die Effektiven Koordinationszahlen ECoN, werden berechnet und diskutiert.Beim thermischen Abbau entsteht vorher unbekanntes gelbes Na3TlO3, aus diesem dann rotes NaTlO2.
Additional Material:
6 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19784430121
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