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Layered RbLnGeS4 (ln = Ce, Pr, Nd, Sm, Gd) : Crystal structures, Rb-site disorder–order transition, and structure–property correlations. / Sapov, Alexander A.; Tarasenko, Maria S.; Kuratieva, Natalia V. et al.

In: Journal of Solid State Chemistry, Vol. 363, 11.2026, p. 126219.

Research output: Contribution to journal › Article › peer-review

Harvard

Sapov, AA, Tarasenko, MS, Kuratieva, NV, Syrokvashin, MM, Ryadun, AA, Troitskii, DY, Yushina, IV & Naumov, NG 2026, 'Layered RbLnGeS4 (ln = Ce, Pr, Nd, Sm, Gd): Crystal structures, Rb-site disorder–order transition, and structure–property correlations', Journal of Solid State Chemistry, vol. 363, pp. 126219. https://doi.org/10.1016/j.jssc.2026.126219

APA

Sapov, A. A., Tarasenko, M. S., Kuratieva, N. V., Syrokvashin, M. M., Ryadun, A. A., Troitskii, D. Y., Yushina, I. V., & Naumov, N. G. (2026). Layered RbLnGeS4 (ln = Ce, Pr, Nd, Sm, Gd): Crystal structures, Rb-site disorder–order transition, and structure–property correlations. Journal of Solid State Chemistry, 363, 126219. https://doi.org/10.1016/j.jssc.2026.126219

Vancouver

Sapov AA, Tarasenko MS, Kuratieva NV, Syrokvashin MM, Ryadun AA, Troitskii DY et al. Layered RbLnGeS4 (ln = Ce, Pr, Nd, Sm, Gd): Crystal structures, Rb-site disorder–order transition, and structure–property correlations. Journal of Solid State Chemistry. 2026 Nov;363:126219. doi: 10.1016/j.jssc.2026.126219

Author

Sapov, Alexander A. ; Tarasenko, Maria S. ; Kuratieva, Natalia V. et al. / Layered RbLnGeS4 (ln = Ce, Pr, Nd, Sm, Gd) : Crystal structures, Rb-site disorder–order transition, and structure–property correlations. In: Journal of Solid State Chemistry. 2026 ; Vol. 363. pp. 126219.

BibTeX

@article{5b78573f81334043ace629976d3b6b78,
title = "Layered RbLnGeS4 (ln = Ce, Pr, Nd, Sm, Gd): Crystal structures, Rb-site disorder–order transition, and structure–property correlations",
abstract = "Rare-earth thiogermanates built from isolated {GeS4} tetrahedra are attractive as optical host lattices, yet rubidium members remain insufficiently explored. Here we report the synthesis of the new members of the RbLnGeS4 series (Ln = Ce, Pr, Nd, Sm, Gd) by a high-temperature reactive flux route and their comprehensive structural and spectroscopic characterization. All compounds crystallize in the non-centrosymmetric orthorhombic space group P212121 and feature anionic [LnGeS4]− layers separated by interlayer Rb+ cations. Single-crystal X-ray diffraction reveals a split Rb position at room temperature, whereas low-temperature data together with DSC measurements indicate suppression of the rubidium positional disorder upon cooling, consistent with a kinetically limited order–disorder process. Raman spectra are dominated by modes of isolated {GeS4} tetrahedra and show systematic Ln–S-related shifts across the series. Diffuse reflectance spectra of representative compounds RbLnGeS4 (Ln = Pr, Gd) yield optical band gaps of ≥3.3 eV. In addition, Sm3+-doped RbGdGeS4 exhibits red f–f emission consistent with a low-symmetry Sm3+ environment in this host lattice.",
keywords = "редкоземельные элементы, тиогерманаты, рубидий, рамановская спектроскопия, спектроскопия диффузного отражения, оптическая ширина запрещенной зоны, фотолюминесценция Sm3+, нецентросимметричные сульфиды, переход порядок-беспорядок, Rare-earth elements, Thiogermanates, Rubidium, Raman spectroscopy, Diffuse reflectance spectroscopy, Optical band gap, Sm3+ photoluminescence, Non-centrosymmetric sulfides, Order–disorder transition",
author = "Sapov, {Alexander A.} and Tarasenko, {Maria S.} and Kuratieva, {Natalia V.} and Syrokvashin, {Mikhail M.} and Ryadun, {Alexey A.} and Troitskii, {Dmitry Y.} and Yushina, {Irina V.} and Naumov, {Nikolay G.}",
note = "Alexander A. Sapov, Maria S. Tarasenko, Natalia V. Kuratieva, Mikhail M. Syrokvashin, Alexey A. Ryadun, Dmitry Y. Troitskii, Irina V. Yushina, Nikolay G. Naumov, Layered RbLnGeS4 (ln = Ce, Pr, Nd, Sm, Gd): crystal structures, Rb-site disorder–order transition, and structure–property correlations, Journal of Solid State Chemistry, Volume 363, 2026, 126219, ISSN 0022-4596, https://doi.org/10.1016/j.jssc.2026.126219. This work was supported by the Ministry of Science and Higher Education of the Russian Federation project FWUZ-2025-002.",
year = "2026",
month = nov,
doi = "10.1016/j.jssc.2026.126219",
language = "English",
volume = "363",
pages = "126219",
journal = "Journal of Solid State Chemistry",
issn = "0022-4596",
publisher = "Elsevier Science Publishing Company, Inc.",

}

RIS

TY - JOUR

T1 - Layered RbLnGeS4 (ln = Ce, Pr, Nd, Sm, Gd)

T2 - Crystal structures, Rb-site disorder–order transition, and structure–property correlations

AU - Sapov, Alexander A.

AU - Tarasenko, Maria S.

AU - Kuratieva, Natalia V.

AU - Syrokvashin, Mikhail M.

AU - Ryadun, Alexey A.

AU - Troitskii, Dmitry Y.

AU - Yushina, Irina V.

AU - Naumov, Nikolay G.

N1 - Alexander A. Sapov, Maria S. Tarasenko, Natalia V. Kuratieva, Mikhail M. Syrokvashin, Alexey A. Ryadun, Dmitry Y. Troitskii, Irina V. Yushina, Nikolay G. Naumov, Layered RbLnGeS4 (ln = Ce, Pr, Nd, Sm, Gd): crystal structures, Rb-site disorder–order transition, and structure–property correlations, Journal of Solid State Chemistry, Volume 363, 2026, 126219, ISSN 0022-4596, https://doi.org/10.1016/j.jssc.2026.126219. This work was supported by the Ministry of Science and Higher Education of the Russian Federation project FWUZ-2025-002.

PY - 2026/11

Y1 - 2026/11

N2 - Rare-earth thiogermanates built from isolated {GeS4} tetrahedra are attractive as optical host lattices, yet rubidium members remain insufficiently explored. Here we report the synthesis of the new members of the RbLnGeS4 series (Ln = Ce, Pr, Nd, Sm, Gd) by a high-temperature reactive flux route and their comprehensive structural and spectroscopic characterization. All compounds crystallize in the non-centrosymmetric orthorhombic space group P212121 and feature anionic [LnGeS4]− layers separated by interlayer Rb+ cations. Single-crystal X-ray diffraction reveals a split Rb position at room temperature, whereas low-temperature data together with DSC measurements indicate suppression of the rubidium positional disorder upon cooling, consistent with a kinetically limited order–disorder process. Raman spectra are dominated by modes of isolated {GeS4} tetrahedra and show systematic Ln–S-related shifts across the series. Diffuse reflectance spectra of representative compounds RbLnGeS4 (Ln = Pr, Gd) yield optical band gaps of ≥3.3 eV. In addition, Sm3+-doped RbGdGeS4 exhibits red f–f emission consistent with a low-symmetry Sm3+ environment in this host lattice.

AB - Rare-earth thiogermanates built from isolated {GeS4} tetrahedra are attractive as optical host lattices, yet rubidium members remain insufficiently explored. Here we report the synthesis of the new members of the RbLnGeS4 series (Ln = Ce, Pr, Nd, Sm, Gd) by a high-temperature reactive flux route and their comprehensive structural and spectroscopic characterization. All compounds crystallize in the non-centrosymmetric orthorhombic space group P212121 and feature anionic [LnGeS4]− layers separated by interlayer Rb+ cations. Single-crystal X-ray diffraction reveals a split Rb position at room temperature, whereas low-temperature data together with DSC measurements indicate suppression of the rubidium positional disorder upon cooling, consistent with a kinetically limited order–disorder process. Raman spectra are dominated by modes of isolated {GeS4} tetrahedra and show systematic Ln–S-related shifts across the series. Diffuse reflectance spectra of representative compounds RbLnGeS4 (Ln = Pr, Gd) yield optical band gaps of ≥3.3 eV. In addition, Sm3+-doped RbGdGeS4 exhibits red f–f emission consistent with a low-symmetry Sm3+ environment in this host lattice.

KW - редкоземельные элементы

KW - тиогерманаты

KW - рубидий

KW - рамановская спектроскопия

KW - спектроскопия диффузного отражения

KW - оптическая ширина запрещенной зоны

KW - фотолюминесценция Sm3+

KW - нецентросимметричные сульфиды

KW - переход порядок-беспорядок

KW - Rare-earth elements

KW - Thiogermanates

KW - Rubidium

KW - Raman spectroscopy

KW - Diffuse reflectance spectroscopy

KW - Optical band gap

KW - Sm3+ photoluminescence

KW - Non-centrosymmetric sulfides

KW - Order–disorder transition

UR - https://www.mendeley.com/catalogue/50f35183-0895-38e3-b004-8509a1ebcb63/

UR - https://www.scopus.com/pages/publications/105045287824

U2 - 10.1016/j.jssc.2026.126219

DO - 10.1016/j.jssc.2026.126219

M3 - Article

VL - 363

SP - 126219

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

SN - 0022-4596

ER -

ID: 82776653