Structure refinement and thermal properties of novel cubic borate Lu 2 Ba 3 B 6 O 15

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1 Citation (Scopus)

Abstract

Novel borate Lu2Ba3B6O15 was prepared using a multi-step high-temperature solid-state synthesis. It crystallizes in the cubic system, I alpha(3) over bar space group, alpha = 14.18197(3) angstrom, v = 2852.396(18) angstrom(3), Z = 8, and it is isostructural with Y2Ba3B6O15. The crystal structure is described as a framework composed of the edge-sharing large irregular BaO9 polyhedra. The intersecting tunnels in this framework are filled with the lutetium atoms. Two planar BO3 triangles are connected to each other by the vertices, forming the isolated B2O5 pyroborate groups. The Lu2Ba3B6O15 thermal behavior was investigated by thermal analysis and high-temperature X-ray powder diffraction (HTXRD). The Lu2Ba3B6O15 sample starts to melt at 1058 degrees C. As the temperature increases, the coefficient of linear expansion increases (alpha(alpha) = 5.7 at 25 degrees C and 8.9 x 10(-6) C-1 at 800 degrees C). The Rietveld refinement of the HTXRD data showed that thermal deformations of the non-rigid BaO9 polyhedra have the greatest influence on the Lu2Ba3B6O15 expansion among those of the other constituent polyhedra.

Original languageEnglish
Pages (from-to)355-361
Number of pages7
JournalMaterials Chemistry and Physics
Volume229
DOIs
Publication statusPublished - 1 May 2019

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Borates
polyhedrons
borates
Thermodynamic properties
thermodynamic properties
X ray powder diffraction
lutetium
expansion
Lutetium
diffraction
triangles
Temperature
Rietveld refinement
tunnels
thermal analysis
apexes
x rays
Thermoanalysis
solid state
Tunnels

Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

@article{8ad17135a12f4e2f90d682e4f7d8fcaa,
title = "Structure refinement and thermal properties of novel cubic borate Lu 2 Ba 3 B 6 O 15",
abstract = "Novel borate Lu2Ba3B6O15 was prepared using a multi-step high-temperature solid-state synthesis. It crystallizes in the cubic system, I alpha(3) over bar space group, alpha = 14.18197(3) angstrom, v = 2852.396(18) angstrom(3), Z = 8, and it is isostructural with Y2Ba3B6O15. The crystal structure is described as a framework composed of the edge-sharing large irregular BaO9 polyhedra. The intersecting tunnels in this framework are filled with the lutetium atoms. Two planar BO3 triangles are connected to each other by the vertices, forming the isolated B2O5 pyroborate groups. The Lu2Ba3B6O15 thermal behavior was investigated by thermal analysis and high-temperature X-ray powder diffraction (HTXRD). The Lu2Ba3B6O15 sample starts to melt at 1058 degrees C. As the temperature increases, the coefficient of linear expansion increases (alpha(alpha) = 5.7 at 25 degrees C and 8.9 x 10(-6) C-1 at 800 degrees C). The Rietveld refinement of the HTXRD data showed that thermal deformations of the non-rigid BaO9 polyhedra have the greatest influence on the Lu2Ba3B6O15 expansion among those of the other constituent polyhedra.",
keywords = "Cubic borate, High-temperature X-ray powder diffraction (HTXRD), Isotropic thermal expansion, Rietveld refinement, Thermal analysis",
author = "Biryukov, {Y. P.} and Krzhizhanovskaya, {M. G.} and Filatov, {S. K.}",
year = "2019",
month = "5",
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doi = "10.1016/j.matchemphys.2019.02.047",
language = "English",
volume = "229",
pages = "355--361",
journal = "Materials Chemistry and Physics",
issn = "0254-0584",
publisher = "Elsevier",

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TY - JOUR

T1 - Structure refinement and thermal properties of novel cubic borate Lu 2 Ba 3 B 6 O 15

AU - Biryukov, Y. P.

AU - Krzhizhanovskaya, M. G.

AU - Filatov, S. K.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - Novel borate Lu2Ba3B6O15 was prepared using a multi-step high-temperature solid-state synthesis. It crystallizes in the cubic system, I alpha(3) over bar space group, alpha = 14.18197(3) angstrom, v = 2852.396(18) angstrom(3), Z = 8, and it is isostructural with Y2Ba3B6O15. The crystal structure is described as a framework composed of the edge-sharing large irregular BaO9 polyhedra. The intersecting tunnels in this framework are filled with the lutetium atoms. Two planar BO3 triangles are connected to each other by the vertices, forming the isolated B2O5 pyroborate groups. The Lu2Ba3B6O15 thermal behavior was investigated by thermal analysis and high-temperature X-ray powder diffraction (HTXRD). The Lu2Ba3B6O15 sample starts to melt at 1058 degrees C. As the temperature increases, the coefficient of linear expansion increases (alpha(alpha) = 5.7 at 25 degrees C and 8.9 x 10(-6) C-1 at 800 degrees C). The Rietveld refinement of the HTXRD data showed that thermal deformations of the non-rigid BaO9 polyhedra have the greatest influence on the Lu2Ba3B6O15 expansion among those of the other constituent polyhedra.

AB - Novel borate Lu2Ba3B6O15 was prepared using a multi-step high-temperature solid-state synthesis. It crystallizes in the cubic system, I alpha(3) over bar space group, alpha = 14.18197(3) angstrom, v = 2852.396(18) angstrom(3), Z = 8, and it is isostructural with Y2Ba3B6O15. The crystal structure is described as a framework composed of the edge-sharing large irregular BaO9 polyhedra. The intersecting tunnels in this framework are filled with the lutetium atoms. Two planar BO3 triangles are connected to each other by the vertices, forming the isolated B2O5 pyroborate groups. The Lu2Ba3B6O15 thermal behavior was investigated by thermal analysis and high-temperature X-ray powder diffraction (HTXRD). The Lu2Ba3B6O15 sample starts to melt at 1058 degrees C. As the temperature increases, the coefficient of linear expansion increases (alpha(alpha) = 5.7 at 25 degrees C and 8.9 x 10(-6) C-1 at 800 degrees C). The Rietveld refinement of the HTXRD data showed that thermal deformations of the non-rigid BaO9 polyhedra have the greatest influence on the Lu2Ba3B6O15 expansion among those of the other constituent polyhedra.

KW - Cubic borate

KW - High-temperature X-ray powder diffraction (HTXRD)

KW - Isotropic thermal expansion

KW - Rietveld refinement

KW - Thermal analysis

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