Journal article

Authors list: Denisenko, YG; Sedykh, AE; Basova, SA; Atuchin, VV; Molokeev, MS; Aleksandrovsky, AS; Krylov, AS; Oreshonkov, AS; Khritokhin, NA; Sal'nikova, EI; Andreev, VO; Müller-Buschbaum, K

Publication year: 2021

Pages: 3943-3953

Journal: Advanced Powder Technology

Volume number: 32

Issue number: 11

ISSN: 0921-8831

eISSN: 1568-5527

DOI Link: https://doi.org/10.1016/j.apt.2021.08.009

Publisher: Elsevier

Abstract: 
Samarium-sodium double sulfate crystalline hydrate NaSm(SO4)(2)center dot H2O was obtained by the crystallization from an aqueous solution containing equimolar amounts of ions. The anhydrous salt of NaSm (SO4)(2) was formed by a thermally induced release of the equivalent of water from NaSm(SO4)(2)center dot H2O. The kinetic parameters of thermal decomposition were determined (E-a = 102 kJ/mol, A = 9.10(6)). The crystal structures of both compounds were refined from the X-ray powder diffraction data. Sulfate hydrate NaSm(SO4)(2)center dot H2O crystallizes in the trigonal symmetry, space group P3(1)21 (a= 6.91820(3) and c= 12.8100(1) angstrom, V= 530.963(7) angstrom(3)). The anhydrous salt crystallizes in the triclinic symmetry, space group P-1 (a = 6.8816(2), b = 6.2968(2) and c = 7.0607(2) angstrom, alpha = 96.035(1), beta = 99.191(1) and gamma = 90.986 (1)degrees, V= 300.17(1) angstrom(3)). The vibrational properties of compounds are mainly determined by the sulfate group deformations. The luminescence spectra of both sulfates are similar and are governed by the transitions of samarium ions (4)G(5/2) -> H-6(j) (J = 5/2, 7/2, 9/2 and 11/2). The anhydrous sulfate is stable up to 1100 K and undergoes an almost isotropic expansion when heated. After 1100 K, the compound decomposes into Sm-2(SO4)(3) and Na2SO4. (C) 2021 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

Harvard Citation style: Denisenko, Y., Sedykh, A., Basova, S., Atuchin, V., Molokeev, M., Aleksandrovsky, A., et al. (2021) Exploration of the structural, spectroscopic and thermal properties of double sulfate monohydrate NaSm(SO4)2·H2O and its thermal decomposition product NaSm(SO4)2, Advanced Powder Technology, 32(11), pp. 3943-3953. https://doi.org/10.1016/j.apt.2021.08.009

APA Citation style: Denisenko, Y., Sedykh, A., Basova, S., Atuchin, V., Molokeev, M., Aleksandrovsky, A., Krylov, A., Oreshonkov, A., Khritokhin, N., Sal'nikova, E., Andreev, V., & Müller-Buschbaum, K. (2021). Exploration of the structural, spectroscopic and thermal properties of double sulfate monohydrate NaSm(SO4)2·H2O and its thermal decomposition product NaSm(SO4)2. Advanced Powder Technology. 32(11), 3943-3953. https://doi.org/10.1016/j.apt.2021.08.009