Geodesic
Structure and ion-exchange properties of tungsten-antimony crystalline acid
Čelâbinskij fiziko-matematičeskij žurnal, Tome 6 (2021) no. 4, pp. 485-496.

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The studies of the structural transformations of tungsten-antimony crystalline acid (TACA) during ion exchange and thermolysis of its substituted M$^+$-, H$^+$-forms (M$^+$ — Li, Na, K, Ag) are carried out. It was shown that hydrated TACA compounds containing monovalent metal ions are stable up to 1020 K with pyrochlore-type structure (space group Fd-3m). Using Rietveld method, the structural characteristics of TACA and its M$^+$-, H$^+$-forms were refined, and a model of crystallographic positions filling with metal ions for pyrochlore-type structure was proposed. Using methods of thermogravimetry, X-ray diffraction and IR spectroscopy, a correlation between the composition of the obtained compounds, structural disorder, and their ion-exchange properties was determined.
Keywords: tungsten-antimony crystalline acid, hydrated compounds, pyrochlore-type structure, ion-exchange properties. 
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     title = {Structure and ion-exchange properties of tungsten-antimony crystalline acid},
     journal = {\v{C}el\^abinskij fiziko-matemati\v{c}eskij \v{z}urnal},
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Yu. A. Lupitskaya; E. M. Filonenko; F. A. Yaroshenko; O. A. Firsova. Structure and ion-exchange properties of tungsten-antimony crystalline acid. Čelâbinskij fiziko-matematičeskij žurnal, Tome 6 (2021) no. 4, pp. 485-496. http://geodesic.mathdoc.fr/item/CHFMJ_2021_6_4_a8/

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