Ring Silicates Cs4Tm2[Si4O12](OH)2 and Cs4(Tm,Tb)2[Si4O12](OH)2 As Merohedral Twins-Reference-Cited by-同舟云学术

Ring Silicates Cs4Tm2[Si4O12](OH)2 and Cs4(Tm,Tb)2[Si4O12](OH)2 As Merohedral Twins

Published:2023-01-01 Issue:1 Volume:68 Page:18-24
ISSN:0023-4761
Container-title:Кристаллография
language:
Short-container-title:Kristallografiâ

Author:

Bolotina N. B.¹,Topnikova A. P.²,Belokoneva E. L.²,Dimitrova O. V.²,Volkov A. S.²,Zorina L. V.³

Affiliation:

1. Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences, 119333, Moscow, Russia

2. Moscow State University, 119991, Moscow, Russia

3. Institute of Solid State Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

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.

Publisher

The Russian Academy of Sciences

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