[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
Jellinek F. J. Inorg. Nucl. Chem. 1960, 13:329-331.
Shinjo T., Ichida T., Takada T. J. Phys. Soc. Jpn. 1970, 29:111.
Vanhook H.J. J. Phys. Chem. 1964, 68:3786.
Mori S. J. Am. Ceram. Soc. 1965, 48:165.
Takeda Y., Shimada M., Kanamaru F., Koizumi M., Yamamoto N. MRS Bull. 1974, 9:537-543.
Gonzalez-Calbet J.M., Parras M., Valletregi M., Grenier J.C. J. Solid State Chem. 1990, 86:149-159.
Parras M., Gonzalez-Calbet J.M., Valletregi M., Grenier J.C. Solid State Ionics 1993, 63(5):714-718.
Scholder R., Vonbunsen H., Zeiss W. Z. Anorg. Allg. Chem. 1956, 283:330-337.
Mansmann M. Z. Anorg. Allg. Chem. 1965, 339:52-56.
Gemini V.I.02, Bruker Analytical X-ray Systems Inc.: Madison, WI; 2000.
Saint: Siemens Area Dectector Integration Program V5.04, Siemens Industrial Automation, Inc.; Madison, W.I.; 1995.
Sheldrick G.M. SADABS: Siemens/Bruker Area Detector Absorption Correction Program V2.03, University of Göttingen: Germany; 2000.
Sheldrick G.M. SHELXS and SHELXL: Part of the SHELXTL Crystal Structure Determination Package, Bruker Analytical X-ray Systems Inc.: Madison, WI; 1995.
Xprep V.5.03 Part of the Shelxtl Crystal Structure Determination Package, Siemens Industrial Automation Inc. Madison, W.I.; 1995.
Bland J.A. Acta Crystallogr. 1961, 14:875.
Mattausch H.J., Muller-Buschbaum H.K. Z. Anorg. Allg. Chem. 1971, 386:1-14.
Mattausch H.J., Muller-Buschbaum H.K. Z. Anorg. Allg. Chem. 1974, 407:129-134.
Chamberland B.L., Herrerofemandez M.P., Hewston T.A. J. Solid State Chem. 1985, 59:111-115.
Liu G., Greedan J.E., Gong W.H. J. Solid State Chem. 1993, 105:78-91.
Liu G., Greedan J.E. J. Solid State Chem. 1993, 103:228-239.
Ruddlesden S.N., Popper P. Acta Ctystallogr. 1957, 10:538-540.
Dann S.E., Weller M.T., Currie D.B. J. Solid State Chem. 1991, 92:237-240.
Lemley J.T., Jenks J.M., Hoggins J.T., Eliezer Z., Steinfink H. J. Solid State Chem. 1976, 16:117-128.
