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

Описание

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1016/j.apt.2021.08.009

Ключевые слова: crystal structure, photoluminescence, raman, sulfate, thermal decomposition

Аннотация: 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 4G5/26HJ (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.

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Издание

Журнал: Advanced Powder Technology

ISSN журнала: 09218831

Издатель: Brill Academic Publishers

Персоны

  • Denisenko Yuriy G. (Ind Univ Tyumen, Dept Gen & Special Chem, Tyumen 625000, Russia; Justus Liebig Univ Giessen, Inst Inorgan & Analyt Chem, Heinrich Buff Ring 17, D-35392 Giessen, Germany; Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia)
  • Sedykh Alexander E. (Justus Liebig Univ Giessen, Inst Inorgan & Analyt Chem, Heinrich Buff Ring 17, D-35392 Giessen, Germany)
  • Basova Sofia A. (Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia)
  • Atuchin V.Victor (SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia; Kemerovo State Univ, Dept Res & Dev, Kemerovo 650000, Russia; Novosibirsk State Univ, Dept Appl Phys, Novosibirsk 630090, Russia)
  • Molokeev Maxim S. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia; Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia)
  • Aleksandrovsky Aleksandr S. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Coherent Opt, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660041, Russia)
  • Krylov Alexander S. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Mol Spect, Krasnoyarsk 660036, Russia)
  • Oreshonkov Aleksandr S. (Siberian Fed Univ, Krasnoyarsk 660041, Russia; Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Mol Spect, Krasnoyarsk 660036, Russia)
  • Khritokhin Nikolay A. (Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia)
  • Sal'nikova Elena I. (Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia; Northern Trans Ural State Agr Univ, MResearch Dept, Tyumen 625003, Russia)
  • Andreev V.Oleg (Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia; UB RAS, Inst Solid State Chem, Lab Chem Rare Earth Cpds, Ekaterinburg 620137, Russia)
  • Muller-Buschbaum Klaus (Justus Liebig Univ Giessen, Inst Inorgan & Analyt Chem, Heinrich Buff Ring 17, D-35392 Giessen, Germany; Justus Liebig Univ Giessen, Ctr Mat Res LaMa, Heinrich Buff Ring 16, D-35392 Giessen, Germany)

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