Structure and Microstructure Characterization of the La2SrB10O19 Glass-ceramics

Authors

  • Jovica N. Stojanović Institute for Technology of Nuclear and Other Mineral Raw Materials
  • Sonja V. Smiljanić Faculty of Technology and Metallurgy, University of Belgrade
  • Snežana R. Grujić Faculty of Technology and Metallurgy, University of Belgrade
  • Predrag J. Vulić Faculty of Mining and Geology, University of Belgrade
  • Srđan D. Matijašević Institute for Technology of Nuclear and Other Mineral Raw Materials
  • Jelena D. Nikolić Institute for Technology of Nuclear and Other Mineral Raw Materials
  • Veljko Savić Institute for Technology of Nuclear and Other Mineral Raw Materials

Abstract

The crystal structure of new lanthanum strontium borate glass-ceramics was refined by the Rietveld method. The results showed that La2SrB10O19 has the monoclinic crystal structure, space group C2 (No. 5) with a = 11.1170(6), b = 6.5667(3), c = 9.2363(3) Å, β = 91.481°, V = 674.04(7) Å3, two formula units per unit-cell, and density 3.830 g cm−3. The main building units of the crystal structure are BO4 tetrahedra and BO3 triangles. Clusters composed of [B5O12] form an infinite double layer running perpendicular to the c-axis. Lanthanum atoms, situated in [B5O12]n layers, are coordinated with 10 oxygen atom in a form of LaO10 polyhedra, while Sr atoms, located between [B5O12]n layers, are coordinated with 8 oxygen atoms in a form of SrO8 polyhedra. Microstructural measurements contain both crystallite domain sizes and microstrain calculations obtained by the Warren-Averbach and the simplified integral-breadth methods.

Downloads

Published

2019-11-27

Issue

Vol. 51 No. 4 (2019)

Section

Articles

License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors retain copyright of the published papers and grant to the publisher the right to publish the article, to be cited as its original publisher in case of reuse, and to distribute it in all forms and media. Articles will be distributed under the Creative Commons Attribution International License (CC BY 4.0).