2007
DOI: 10.1016/j.pmatsci.2006.09.002
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Thermodynamics of rare earth sesquioxides

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Cited by 464 publications
(358 citation statements)
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“…Crystal structure of Ln 2 TiO 5 The crystallographic polymorphs of the Ln-Ti-O ternary system, including Ln 2 TiO 5 , the lanthanide peroviskites LnTiO 3 , and pyrochlores Ln 2 Ti 2 O 7 , originate from the polymorphism of the rare earth sesquioxides Ln 2 O 3 , known as A-, B-, C-, H-and X-types, which also depends on both temperature and the radii of Ln 3+ cations. 20,21 Previous experimental studies established that the structure of rare-earth titanates Ln 2 TiO 5 varies with the ionic radius of Ln 3+ and temperature. 22,23 Compositions with cation elements from La to Sm crystallize in the orthorhombic structures with a Pnma symmetry, and those of Ln = Er -Lu, Sc have a cubic lattice with the Fm3m or Fd3m symmetry.…”
Section: Resultsmentioning
confidence: 99%
“…Crystal structure of Ln 2 TiO 5 The crystallographic polymorphs of the Ln-Ti-O ternary system, including Ln 2 TiO 5 , the lanthanide peroviskites LnTiO 3 , and pyrochlores Ln 2 Ti 2 O 7 , originate from the polymorphism of the rare earth sesquioxides Ln 2 O 3 , known as A-, B-, C-, H-and X-types, which also depends on both temperature and the radii of Ln 3+ cations. 20,21 Previous experimental studies established that the structure of rare-earth titanates Ln 2 TiO 5 varies with the ionic radius of Ln 3+ and temperature. 22,23 Compositions with cation elements from La to Sm crystallize in the orthorhombic structures with a Pnma symmetry, and those of Ln = Er -Lu, Sc have a cubic lattice with the Fm3m or Fd3m symmetry.…”
Section: Resultsmentioning
confidence: 99%
“…The sesquioxides Sc 2 O 3 ,Y 2 O 3 and Lu 2 O 3 crystallize in cubic bixbyite [15] structure making them suitable gain materials for TDLs where a uniform thermal expansion coefficient is favorable to avoid stress in the crystal. As all cubic sesquioxides form continuous series of solid solutions [16], the mixed sesquioxides YScO 3 , LuScO 3 , and ScYLO possess similar crystallographic properties compared to pure sesquioxides containing only one kind of metal ions.…”
Section: Spectroscopic Investigationsmentioning
confidence: 99%
“…Thus, oxygen diffusion rates through the oxides can be high. 47 Any differences in oxide structure (and related nonstoichiometry) may result in different oxygen diffusion rates through the various oxides, and lead to the differences in observed oxidation rates between alloys.…”
Section: Microstructure Evolution During Oxidationmentioning
confidence: 99%