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Lanthanum silicate 2La2O3 · 3SiO3

  • N. A. Toropov
  • I. A. Bondar'
Brief Communications

Summary

  1. 1.

    Lanthanum silicate 2La2O3·3SiO2 was synthesized; it melts congruently at 2020”. The mean refractive index of crystals of this compound is 1.90.

     
  2. 2.

    Lanthanum silicate is characterized by hexagonal syngony. The parameters of its elementary cell were determined.

     
  3. 3.

    The elementary cell contains two 2La2O3· 3SiO2 molecules. The pycnometric density of the compound is 5.31 g/cm3; the density calculated from the x-ray data is 5.303 g/cm3.

     
  4. 4.

    It is probable that lanthanum silicate belongs to the olivine group and is lanthanum orthosilicate La4(SiO4)3.

     

Keywords

Silicate Refractive Index Hexagonal Olivine Lanthanum 
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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Literature cited

  1. [1]
    C. E. Curtis and J. R. Johnson, J. Am. Ceram. Soc. 40, 1, 15 (1957).Google Scholar
  2. [2]
    N. V. Belov, Crystallography 3, 3, 250 (1958).Google Scholar

Copyright information

© Consultants Bureau Enterprises, Inc. 1960

Authors and Affiliations

  • N. A. Toropov
    • 1
  • I. A. Bondar'
    • 1
  1. 1.Institute of Silicate Chemistry of the Academy of Sciences of the USSRUSSR

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