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Thermal expansion of phosphate–sulfates of eulytite structure

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Abstract

New phosphate–sulfates of the next chemical formulae ASr2Eu(PO4)2SO4 (A = K, Rb, Cs), NaBa6Zr(PO4)5SO4, Pb2Mg2(PO4)2SO4, and BaxSr4−x(PO4)2SO4 (0 ≤ x ≤ 4) have been designed and synthesized with the aim of investigating their thermal expansion properties in the low-temperature region. Obtained samples have been characterized with X-ray, IR, DTA, and microprobe electron analyses. Crystal structure and unit cell parameters were derived from the least-squares refinement of powder X-ray diffraction data (eulytite-type, sp. gr. \(I 4 {\bar{\text{3}}}d\)). The magnitudes of average linear thermal expansion coefficients vary from 1.1 × 10−5 to 1.7 × 10−5 K−1, which is conducive for application in optics and electronics.

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Acknowledgements

The present work was performed at the Lobachevsky State University of Nizhni Novgorod with the financial support of the Russian Foundation for Basic Research (Project No. 18-03-00043).

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Pet’kov, V.I., Dmitrienko, A.S. & Bokov, A.I. Thermal expansion of phosphate–sulfates of eulytite structure. J Therm Anal Calorim 133, 199–205 (2018). https://doi.org/10.1007/s10973-017-6676-7

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  • DOI: https://doi.org/10.1007/s10973-017-6676-7

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