Home Silicate-germanate K2Y[(Si3Ge)O10(OH)] with unusual complex corrugated layer and its correlation to ring silicate gerenite and chain silicate chkalovite
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Silicate-germanate K2Y[(Si3Ge)O10(OH)] with unusual complex corrugated layer and its correlation to ring silicate gerenite and chain silicate chkalovite

  • Anastasiia P. Topnikova EMAIL logo , Elena L. Belokoneva , Olga V. Dimitrova , Anatoly S. Volkov and Leokadiya V. Zorina
Published/Copyright: April 8, 2020
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Zeitschrift für Kristallographie - Crystalline Materials
From the journal Zeitschrift für Kristallographie - Crystalline Materials Volume 235 Issue 4-5

Abstract

A new silicate-germanate K2Y[(Si3Ge)O10(OH)] was synthesized hydrothermally in a system Y2O3:GeO2:SiO2 = 1:1:2 (T = 280 °C; P = 90–100 atm.); K2CO3 was added to the solution as a mineralizer. Single-crystal X-ray diffraction experiment was carried out at low temperature (150 K). The unit cell parameters are a = 10.4975(4), b = 6.9567(2), c = 15.4001(6) Å, β = 104.894(4)°; V = 1086.86(7) Å3; space group is P 21/c. A novel complex anion is presented by corrugated (Si,Ge) tetrahedral layers connected by couples of YO6 octahedra into the mixed microporous framework with the channels along b and a axes, the maximal size of cross-section is ~5.6 Å. This structure has similarity with the two minerals: ring silicate gerenite (Ca,Na)2(Y,REE)3Si6O18 · 2H2O and chain silicate chkalovite Na2BeSi2O6. Six-member rings with 1̅ symmetry as in gerenite are distinguished in the new layer. They are mutually perpendicular to each other and connected by additional tetrahedra. Straight crossing chains in chkalovite change to zigzag four-link chains in the new silicate-germanate layer.

Keywords: hydrothermal synthesis; low temperature X-ray diffraction experiment; single crystal structure; Y silicate-germanate

Acknowledgements

This work was supported by Russian Foundation for Basic Research (RFBR) [grant numbers 18-35-00645 and 18-33-01129]. Work in Chernogolovka was carried out within the state task for ISSP RAS. The authors are grateful to Dr. Dmitry Ksenofontov for his aid in calculation of theoretical powder XRD pattern and to Dr. Vasiliy Yapaskurt for determination of chemical compositions (both Lomonosov Moscow State University, Geological faculty).

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Supplementary Material

The online version of this article offers supplementary material (https://doi.org/10.1515/zkri-2020-0005).

Received: 2020-01-14
Accepted: 2020-03-13
Published Online: 2020-04-08
Published in Print: 2020-05-26

©2020 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Graphical Synopsis
  3. Inorganic Crystal Structures
  4. Crystallographic orientation of ilmenite inclusions in amphibole – an electron backscatter diffraction study
  5. Quaternary intermetallics RE2Pt3Ga4In (RE=Y, Gd-Tm) – intergrowth structures of NdRh2Sn4 and TiNiSi related slabs
  6. Impact of the production method and diagnostics conditions on the compositions and structure of nanodimensional anatase
  7. Alkaline earth metal ordering in CaCu9Mg2 and SrCu9Mg2
  8. Elucidating the physical properties of the molybdenum oxide Mo4O11 and its tantalum substituted variant Mo2Ta2O11
  9. Coordination sequences of 2-uniform graphs
  10. Silicate-germanate K2Y[(Si3Ge)O10(OH)] with unusual complex corrugated layer and its correlation to ring silicate gerenite and chain silicate chkalovite
  11. Letter
  12. On the 80th birthday of Professor (retired) Dr. Dr. h.c. Peter Paufler
https://doi.org/10.1515/zkri-2020-0005
Keywords for this article
hydrothermal synthesis; low temperature X-ray diffraction experiment; single crystal structure; Y silicate-germanate

Articles in the same Issue

  1. Frontmatter
  2. Graphical Synopsis
  3. Inorganic Crystal Structures
  4. Crystallographic orientation of ilmenite inclusions in amphibole – an electron backscatter diffraction study
  5. Quaternary intermetallics RE2Pt3Ga4In (RE=Y, Gd-Tm) – intergrowth structures of NdRh2Sn4 and TiNiSi related slabs
  6. Impact of the production method and diagnostics conditions on the compositions and structure of nanodimensional anatase
  7. Alkaline earth metal ordering in CaCu9Mg2 and SrCu9Mg2
  8. Elucidating the physical properties of the molybdenum oxide Mo4O11 and its tantalum substituted variant Mo2Ta2O11
  9. Coordination sequences of 2-uniform graphs
  10. Silicate-germanate K2Y[(Si3Ge)O10(OH)] with unusual complex corrugated layer and its correlation to ring silicate gerenite and chain silicate chkalovite
  11. Letter
  12. On the 80th birthday of Professor (retired) Dr. Dr. h.c. Peter Paufler
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