TY - JOUR

T1 - Exploration of the structural, spectroscopic and thermal properties of double sulfate monohydrate NaSm(SO4)2·H2O and its thermal decomposition product NaSm(SO4)2

AU - Denisenko, Yuriy G.

AU - Sedykh, Alexander E.

AU - Basova, Sofia A.

AU - Atuchin, Victor V.

AU - Molokeev, Maxim S.

AU - Aleksandrovsky, Aleksandr S.

AU - Krylov, Alexander S.

AU - Oreshonkov, Aleksandr S.

AU - Khritokhin, Nikolay A.

AU - Sal'nikova, Elena I.

AU - Andreev, Oleg V.

AU - Müller-Buschbaum, Klaus

N1 - Funding Information: This work was partly supported by the Russian Science Foundation ( 21-19-00046 ) and Russian Foundation for Basic Research (Grant 19-33-90258\19 ). The use of the equipment of Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center “Krasnoyarsk Science Center SB RAS” is acknowledged. Publisher Copyright: © 2021 The Society of Powder Technology Japan

PY - 2021/11

Y1 - 2021/11

N2 - Samarium-sodium double sulfate crystalline hydrate NaSm(SO4)2·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·H2O. The kinetic parameters of thermal decomposition were determined (Ea = 102 kJ/mol, A = 9·106). The crystal structures of both compounds were refined from the X-ray powder diffraction data. Sulfate hydrate NaSm(SO4)2·H2O crystallizes in the trigonal symmetry, space group P3121 (a = 6.91820(3) and c = 12.8100(1) Å, V = 530.963(7) Å3). 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) Å, α = 96.035(1), β = 99.191(1) and γ = 90.986(1)°, V = 300.17(1) Å3). 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 4G5/2 → 6HJ (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 Sm2(SO4)3 and Na2SO4.

AB - Samarium-sodium double sulfate crystalline hydrate NaSm(SO4)2·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·H2O. The kinetic parameters of thermal decomposition were determined (Ea = 102 kJ/mol, A = 9·106). The crystal structures of both compounds were refined from the X-ray powder diffraction data. Sulfate hydrate NaSm(SO4)2·H2O crystallizes in the trigonal symmetry, space group P3121 (a = 6.91820(3) and c = 12.8100(1) Å, V = 530.963(7) Å3). 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) Å, α = 96.035(1), β = 99.191(1) and γ = 90.986(1)°, V = 300.17(1) Å3). 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 4G5/2 → 6HJ (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 Sm2(SO4)3 and Na2SO4.

KW - Crystal structure

KW - Photoluminescence

KW - Raman

KW - Sulfate

KW - Thermal decomposition

UR - http://www.scopus.com/inward/record.url?scp=85115976848&partnerID=8YFLogxK

U2 - 10.1016/j.apt.2021.08.009

DO - 10.1016/j.apt.2021.08.009

M3 - Article

AN - SCOPUS:85115976848

VL - 32

SP - 3943

EP - 3953

JO - Advanced Powder Technology

JF - Advanced Powder Technology

SN - 0921-8831

IS - 11

ER -