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Ring Silicates Cs4Tm2[Si4O12](OH)2 and Cs4(Tm,Tb)2[Si4O12](OH)2 As Merohedral Twins
- Authors: Bolotina N.B.1, Topnikova A.P.2, Belokoneva E.L.2, Dimitrova O.V.2, Volkov A.S.2, Zorina L.V.3
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Affiliations:
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences, 119333, Moscow, Russia
- Moscow State University, 119991, Moscow, Russia
- Institute of Solid State Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia
- Issue: Vol 68, No 1 (2023)
- Pages: 18-24
- Section: СТРУКТУРА НЕОРГАНИЧЕСКИХ СОЕДИНЕНИЙ
- URL: https://rjmseer.com/0023-4761/article/view/673530
- DOI: https://doi.org/10.31857/S0023476123010058
- EDN: https://elibrary.ru/DNOCPX
- ID: 673530
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Abstract
New ring silicates Cs4Tm2[Si4O12](OH)2 and Cs4(Tm,Tb)2[Si4O12](OH)2 have been synthesized by the hydrothermal method. A structural analogy is revealed between them and the previously studied silicates K4Sc2(OH)2(Si4O12) and K2Sc[Si2O6]F. Their crystal structures are identified as orthorhombic merohedral twins by the lost element of tetragonal symmetry. The structures of new ring silicates are related to those of fresnoite and tetragonal melilite.
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About the authors
N. B. Bolotina
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences, 119333, Moscow, Russia
Email: bolotina@crys.ras.ru
Россия, Москва
A. P. Topnikova
Moscow State University, 119991, Moscow, Russia
Email: bolotina@crys.ras.ru
Россия, Москва
E. L. Belokoneva
Moscow State University, 119991, Moscow, Russia
Email: bolotina@crys.ras.ru
Россия, Москва
O. V. Dimitrova
Moscow State University, 119991, Moscow, Russia
Email: bolotina@crys.ras.ru
Россия, Москва
A. S. Volkov
Moscow State University, 119991, Moscow, Russia
Email: bolotina@crys.ras.ru
Россия, Москва
L. V. Zorina
Institute of Solid State Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia
Author for correspondence.
Email: bolotina@crys.ras.ru
Россия, Черноголовка
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