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Journal of Structural Chemistry

, Volume 59, Issue 8, pp 1995–2000 | Cite as

Powder X-Ray Diffraction Data on Polymorphism of RbBSi2O6 and Crystal Structure of Its High-Temperature Modification

  • M. G. KrzhizhanovskayaEmail author
  • R. S. Bubnova
  • S. K. Filatov
Article
  • 2 Downloads

Abstract

Structural deformations and phase transformations of Rb-boroleucite RbBSi2O6 obtained by crystallization from glass at 1000 °C are studied by high-temperature X-ray powder diffraction and differential scanning calorimetry in the range 25–1200 °C. At 345 °C the compound undergoes a reversible cubic-cubic polymorphic transition with increasing symmetry \(I\bar 43d \leftrightarrow Ia\bar 3d\). The crystal structure of RbBSi2O6 is refined by the Rietveld method at temperatures of 25 °C, 100 °C, 200 °C, 300 °C, 310 °C, 320 °C, 330 °C, 340 °C, 350 °C, 360 °C, 380 °C, 400 °C, 500 °C, 600 °C, 700 °C, 800 °C, and 900 °C, according to the powder X-ray diffraction data.

Keywords

borosilicates leucite powder X-ray diffraction thermal behavior polymorphism 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • M. G. Krzhizhanovskaya
    • 1
    Email author
  • R. S. Bubnova
    • 1
    • 2
  • S. K. Filatov
    • 1
  1. 1.Institute of Earth SciencesSt. Petersburg State UniversitySt. PetersburgRussia
  2. 2.Institute of Silicate ChemistryRussian Academy of SciencesSt. PetersburgRussia

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