Journal of Siberian Federal University. Chemistry / System NaF-KF-AlF₃: Solid Solutions Based on the Сhiolite Structure

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Supplementary material
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Issue
Journal of Siberian Federal University. Chemistry. 2017 10 (2)
Authors
Samoilo, Aleksander S.; Zaitseva, Yulia N.; Dubinin, Petr S.; Bezrukova, Oksana E.; Ruzhnikov, Sergei G.; Yakimov, Igor S.; Kirik, Sergei D.
Contact information
Samoilo, Aleksander S.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660049, Russia; Dubinin, Petr S.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660049, Russia; Bezrukova, Oksana E.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660049, Russia; Ruzhnikov, Sergei G.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660049, Russia; Yakimov, Igor S.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660049, Russia; Kirik, Sergei D.: Siberian Federal University 79 Svobodny, Krasnoyarsk, 660049, Russia
Keywords
Na₅Al₃F₁₄; system NaF-KF-AlF₃; Na₅Al₃F₁₄; solid solutions; X-ray powder diffraction
Abstract

The formation of solid solutions in the NaF-KF-AlF₃ system has been studied by X-ray diffraction on samples obtained experimentally. For the first time the formation of solid solutions based on structure of chiolite with the composition (Na(5-x)Kx)Al₃F₁₄ , 0 < x < 0,4) has been established. The change of a crystal lattice of chiolite occurs in the range: (a) – from 7,010 (3) to 7,050 (3) Å, (c) from 10,365 (10) Å to 10,400 (10) Å. The sodium potassium substitution occurs at only a 2-fold sodium position by an amount ~ 40 % established by refinement of the crystal structure. The limit dissolution of chiolite in less than 5 % (wt.) KF. The solid solution is stable in the range from the melting temperature to the room

Pages
165-174
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/33635