The solubility of sodium and potassium fluorides in strontium fluoride
https://doi.org/10.17586/2220-8054-2017-8-6-830-834
Abstract
The phase diagram of the NaF–SrF2 system was studied by thermal analysis and X-ray powder diffraction analysis with the determination of the chemical composition. The system was found to be of the eutectic type. The eutectic co-ordinates are 853 ◦C, 32 mol % SrF2. A narrow range of the existence of solid solution Sr1−xNaxF2−x was established. The NaF solubility reaches a maximal value of x = 0.035 at eutectic temperature. The solubility of KF in SrF2 is very low.
Keywords
strontium fluoride,
sodium fluoride,
potassium fluoride,
nanofluorides,
NaF-SrF2 phase diagram,
solid solution
Supporting agencies: The authors express their appreciation V.V. Voronov for his kind assistance in the X-ray diffraction experiments. The authors also wish to thank E.V. Chernova for her help in the preparation of the present manuscript. This work was partially supported by RFBR 15-08-02481-a grant.
About the Authors
P. P. Fedorov
Prokhorov General Physics Institute, Russian Academy of Sciences; Ogarev Mordovia State University
Russian Federation
Russian Federation
Moscow, 119991; Saransk, 430005
M. N. Mayakova
Prokhorov General Physics Institute, Russian Academy of Sciences
Russian Federation
Russian Federation
Moscow, 119991
V. A. Maslov
Prokhorov General Physics Institute, Russian Academy of Sciences
Russian Federation
Russian Federation
Moscow, 119991
A. E. Baranchikov
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Moscow, 119991
V. K. Ivanov
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Moscow, 119991
A. A. Pynenkov
Ogarev Mordovia State University
Russian Federation
Russian Federation
Saransk, 430005
M. A. Uslamina
Ogarev Mordovia State University
Russian Federation
Russian Federation
Saransk, 430005
K. N. Nishchev
Ogarev Mordovia State University
Russian Federation
Russian Federation
Saransk, 430005
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Review
For citations:
Fedorov P.P., Mayakova M.N., Maslov V.A., Baranchikov A.E., Ivanov V.K., Pynenkov A.A., Uslamina M.A., Nishchev K.N. The solubility of sodium and potassium fluorides in strontium fluoride. Nanosystems: Physics, Chemistry, Mathematics. 2017;8(6):830-834. https://doi.org/10.17586/2220-8054-2017-8-6-830-834
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