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Protonated Forms of Layered Perovskite-Like Titanate NaNdTiO4: Neutron and X-ray Diffraction Structural Analysis

Department of Chemical Thermodynamics and Kinetics, Institute of Chemistry, Saint Petersburg State University, 198504 Saint Petersburg, Russia
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Academic Editor: Mirosław Mączka
Solids 2021, 2(3), 265-277; https://doi.org/10.3390/solids2030017
Received: 20 April 2021 / Revised: 22 June 2021 / Accepted: 23 June 2021 / Published: 1 July 2021
(This article belongs to the Special Issue Feature Papers of Solids 2021)
Structures of partially and completely protonated Ruddlesden–Popper phases, H0.7Na0.3NdTiO4·0.3H2O and HNdTiO4, have been established by means of neutron and X-ray diffraction analysis and compared among themselves as well as with that of the initial titanate NaNdTiO4. It was shown that while interlayer sodium cations in the partially protonated form are coordinated by nine oxygen atoms, including one related to intercalated water, in the fully protonated compound the ninth oxygen proves to be an axial anion belonging to the opposite slab of titanium-oxygen octahedra. Moreover, the partially protonated titanate was found to significantly differ from the other two in the octahedron distortion pattern. It is characterized by a weakly pronounced elongation of the octahedra towards the Nd-containing interlayer space making Ti4+ cations practically equidistant from both axial oxygen atoms, which is accompanied by a low-frequency shift of the bands relating to the asymmetric stretching mode of axial Ti–O bonds observed in the Raman spectra. View Full-Text
Keywords: layered perovskite; titanate; protonation; hydration; structure; neutron diffraction layered perovskite; titanate; protonation; hydration; structure; neutron diffraction
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MDPI and ACS Style

Silyukov, O.I.; Kurnosenko, S.A.; Minich, I.A.; Rodionov, I.A.; Zvereva, I.A. Protonated Forms of Layered Perovskite-Like Titanate NaNdTiO4: Neutron and X-ray Diffraction Structural Analysis. Solids 2021, 2, 265-277. https://doi.org/10.3390/solids2030017

AMA Style

Silyukov OI, Kurnosenko SA, Minich IA, Rodionov IA, Zvereva IA. Protonated Forms of Layered Perovskite-Like Titanate NaNdTiO4: Neutron and X-ray Diffraction Structural Analysis. Solids. 2021; 2(3):265-277. https://doi.org/10.3390/solids2030017

Chicago/Turabian Style

Silyukov, Oleg I., Sergey A. Kurnosenko, Iana A. Minich, Ivan A. Rodionov, and Irina A. Zvereva. 2021. "Protonated Forms of Layered Perovskite-Like Titanate NaNdTiO4: Neutron and X-ray Diffraction Structural Analysis" Solids 2, no. 3: 265-277. https://doi.org/10.3390/solids2030017

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