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A study of synthetic and natural eucryptite

  • V. A. Kolesova
Brief Communications

Summary

  1. 1.

    In hydrothermal conditions at a temperature of 350°C and a pressure of 130 kg/cm2 the low temperature form of eucryptite, α-Li2O · Al2O3 · 2SiO2, has been synthesized. The material was identical in structure and properties with the natural minerala - eucryptite.

     
  2. 2.

    The high temperature modification of eucryptite,β-Li2O · Al2O3 · 2SiO2, was obtained by thermal transformation of α-eucryptite, and also by crystallization of glass of the stoichiometnc composition.

     
  3. 3.

    The infrared absorption spectra of natural and synthetic α-eucryptite and syntheticβ-eucryptite were studied. The band in the 900–1000 cm−1 region is shifted to higher frequencies as the degree of polymerization of the anionic skeleton increases in the transition from α- toβ-eucryptite.

     

Keywords

Polymerization Crystallization Al2O3 Absorption Spectrum Temperature Modification 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Consultants Bureau 1963

Authors and Affiliations

  • V. A. Kolesova
    • 1
  1. 1.I. V. Grebenshikov Institute of Silicate ChemistryUSSR Academy of SciencesUSSR

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