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Characterization of Lanthanum(III) Chromium(V) Tetraoxide by X-Ray Photoelectron Spectroscopy

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Title: Characterization of Lanthanum(III) Chromium(V) Tetraoxide by X-Ray Photoelectron Spectroscopy
Authors: KONNO, Hidetaka Browse this author
TACHIKAWA, Hiroto Browse this author →KAKEN DB
FURUSAKI, Atsushi Browse this author
FURUICHI, Ryusaburo Browse this author
Keywords: Lanthanum(III) chromium(V) monazite type oxide
lanthanum(III) chromium(III) perovskite type oxide
X-ray photoelectron spectroscopy
ab initio molecular orbital calculation
Issue Date: Oct-1992
Publisher: Japan Society for Analytical Chemistry
Journal Title: Analytical Sciences
Volume: 8
Issue: 5
Start Page: 641
End Page: 646
Publisher DOI: 10.2116/analsci.8.641
Abstract: Lanthanum(III) chromium(V) tetraoxide, LaCrO4, was synthesized by a thermal decomposition method and characterized by X-ray photoelectron spectroscopy and ab initio molecular orbital calculations. The chromium(V) state in LaCrO4 is stable in both air and vacuum. The electron binding energies, EB, and Auger parameters, α, of Cr(V) and La(III) indicated that the covalency of the Cr-O bonds in CrO4 tetrahedra is higher than that in CrO6 octahedra of LaCrO3, and that La(III) in LaCrO4 is more ionic than in LaCrO3. The results of ab initio molecular orbital calculations agreed with the measured characteristics, that is, the electrons are flowing from oxygen to Cr(V) and the covalency plays a significant part in the Cr-O bonds. This behavior of the Cr-O bond was considered to contribute to stabilizing CrO43- tetrahedra.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田地川 浩人

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