Article (Scientific journals)
Study of the structural, electronic, and magnetic properties of the barium-rich iron(IV) oxides, Ba2FeO4 and Ba3FeO5
Delattre, J. L.; Stacy, A. M.; Young, V. G. et al.
2002In Inorganic Chemistry, 41 (11), p. 2834-2838
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Abstract :
[en] Crystals of Ba2FeO4 and Ba3FeO5, grown from a "self-sealing" KOH-Ba(OH)(2) flux, have been characterized by single-crystal X-ray diffraction, Mossbauer spectroscopy, and magnetic measurements. Ba2FeO4 forms nonmerohedral twinned crystals with the monoclinic space group P2(1)/c, a = 6.034(2) Angstrom, b = 7.647(2) Angstrom, c = 10.162(3) Angstrom, beta = 92.931(6)degrees, and Z = 4. Ba3FeO5 crystallizes in the orthorhombic space group Pnma, with a = 10.301(1) Angstrom, b = 8.151(1) Angstrom, c = 7.611(1) Angstrom, and Z = 4. While both compounds feature discrete FeO44- 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 alpha-iron for Ba2FeO4 and Ba3FeO5, respectively.
Disciplines :
Chemistry
Author, co-author :
Delattre, J. L.
Stacy, A. M.
Young, V. G.
Long, G. J.
Hermann, Raphaël ;  Université de Liège - ULiège > Département de physique > Département de physique
Grandjean, Fernande ;  Université de Liège - ULiège > Département de physique > Département de physique
Language :
English
Title :
Study of the structural, electronic, and magnetic properties of the barium-rich iron(IV) oxides, Ba2FeO4 and Ba3FeO5
Publication date :
2002
Journal title :
Inorganic Chemistry
ISSN :
0020-1669
eISSN :
1520-510X
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
41
Issue :
11
Pages :
2834-2838
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 19 October 2011

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