Affiliation:
1. Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia
2. Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
3. Faculty of Mining and Geology, University of Belgrade, Belgrade, Serbia
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) ?, ? = 91.481?, V = 674.04(7) ?3, 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.
Funder
Ministry of Education, Science and Technological Development of the Republic of Serbia
Publisher
National Library of Serbia
Subject
Materials Chemistry,Metals and Alloys,Condensed Matter Physics,Ceramics and Composites
Cited by
3 articles.
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