Study of the Structural, Electronic, and Magnetic Properties of the Barium-rich Iron(IV) Iron(IV) Oxides, Ba₂FeO₄ and Ba₃FeO₅

Author

James L. Delattre
Angelica M. Stacy
Jr. Victor Young
Gary J. Long, Missouri University of Science and TechnologyFollow
Raphäel P. Hermann
Fernande Grandjean, Missouri University of Science and TechnologyFollow

Abstract

Crystals of Ba₂FeO₄ and Ba₃FeO₅, grown from a "self-sealing" KOH-Ba(OH)₂ flux, have been characterized by single-crystal X-ray diffraction, Mössbauer spectroscopy, and magnetic measurements. Ba₂FeO₄ forms nonmerohedral twinned crystals with the monoclinic space group P2₁/n, a = 6.034(2) Å, b = 7.647(2) Å, c = 10.162(3) Å, ß = 92.931(6)°, and Z = 4. Ba₃FeO₅ crystallizes in the orthorhombic space group Pnma, with a = 10.301 (1) Å, b = 8.151 (1) Å, c = 7.611 (1) Å, and Z = 4. While both compounds feature discrete FeO₄^4- tetrahedra, the anion found in Ba₂FeO₄ has shorter Fe-O bonds and is significantly distorted relative to the Ba₃FeO₅ anion. An iron valence of 4+ was confirmed by magnet susceptibility measurements and by the low-temperature isomer shifts of -0.152 and -0.142 mm/s relative to α-iron for Ba2FeO4 and Ba₂FeO₅, respectively.

Recommended Citation

J. L. Delattre et al., "Study of the Structural, Electronic, and Magnetic Properties of the Barium-rich Iron(IV) Iron(IV) Oxides, Ba₂FeO₄ and Ba₃FeO₅," Inorganic Chemistry, vol. 41, no. 11, pp. 2834 - 2838, American Chemical Society (ACS), Jun 2002.

The definitive version is available at https://doi.org/10.1021/ic0113247

Department(s)

Chemistry

Keywords and Phrases

Barium; Iron Oxide; Potassium Hydroxide; Chemical Analysis; Chemical Bond; Chemical Structure; Crystallization; Magnetism; Measurement; Temperature Dependence; X Ray Diffraction

International Standard Serial Number (ISSN)

0020-1669

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2002 American Chemical Society (ACS), All rights reserved.

Publication Date

01 Jun 2002