57Fe-Mössbauer Spectra and X-Ray Structures of Dipolar Ferrocenylhexasilanes

Samples of EuRu4B4 and of the new boride EuRuB4 were prepared from europium, RuB, and RuB4 precursor alloys, respectively, in sealed tantalum tubes in an induction furnace. EuRu4B4 crystallizes with the LuRu4B4 structure, a = 748.1(1), c = 1502.3(4) pm. The structure of EuRuB4 was refined on the basis of X-ray diffractometer data: Pbam, a = 599.7(1), b = 1160.7(3), c = 358.06(7) pm, wR2 = 0.0691, 474 F2 values, and 38 variables. The four crystallographically independent boron sites build up layers which consist of almost regular pentagons and heptagons which sandwich the ruthenium and europium atoms, respectively. Within the two-dimensional [B4] networks each boron atom has a slightly distorted trigonal-planar boron coordination with B-B distances in the range 172 - 186 pm. Temperature-dependent 151Eu Mössbauer spectra show stable trivalent europium for EuRu4B4 and EuRuB4

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Microstructure Evolution and Mossbauer Spectroscopy Research of Nanostructured Ni3 Fe Intermetallic

Journal of Metastable and Nanocrystalline Materials ◽

10.4028/www.scientific.net/jmnm.32.1 ◽

2021 ◽

Vol 32 ◽

pp. 1-13

Author(s):

Amel Kaibi ◽

Abderrahim Guittoum ◽

Nassim Souami ◽

Mohamed Kechouane

Keyword(s):

Magnetic Field ◽

Mössbauer Spectroscopy ◽

Mössbauer Spectra ◽

Milling Time ◽

Mossbauer Spectroscopy ◽

Hyperfine Magnetic Field ◽

X Ray Diffraction ◽

X Ray ◽

Mossbauer Spectra ◽

Mößbauer Spectroscopy

Nanocrystalline Ni75Fe25 (Ni3Fe) powders were prepared by mechanical alloying process using a vario-planetary high-energy ball mill. The intermetallic Ni3Fe formation and different physical properties were investigated, as a function of milling time, t, (in the range 6 to 96 h range), using X-Ray Diffraction (XRD) and Mössbauer Spectroscopy techniques. X-ray diffraction were performed on the samples to understand the structural characteristics and get information about elements and phases present in the powder after different time of milling. The refinement of XRD spectra revealed the complete formation of fcc Ni (Fe) disordered solid solution after 24 h of milling time, the Fe and Ni elemental distributions are closely correlated. With increasing the milling time, the lattice parameter increases and the grains size decreases. The Mössbauer experiments were performed on the powders in order to follow the formation of Ni3Fe compound as a function of milling time. From the adjustment of Mössbauer spectra, we extracted the hyperfine parameters. The evolution of hyperfine magnetic field shows that the magnetic disordered Ni3Fe phase starts to form from 6 h of milling time and grow in intensity with milling time. For the milling time more than 24 h, only the Ni3Fe disordered phase is present with a mean hyperfine magnetic field of about 29.5 T. The interpretation of the Mossbauer spectra confirmed the results obtained by XRD.

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Electronic and magnetic states of Fe ions in the Co2FeBO5

Dalton Transactions ◽

10.1039/d1dt00125f ◽

2021 ◽

Author(s):

Natalia Kazak ◽

Yurii V. Knyazev ◽

Vyacheslav Zhandun ◽

Juan Bartolomé ◽

Ana Arauzo ◽

...

Keyword(s):

Mössbauer Spectroscopy ◽

Room Temperature ◽

Mössbauer Spectra ◽

Mossbauer Spectroscopy ◽

57Fe Mössbauer Spectroscopy ◽

57Fe Mössbauer ◽

Mossbauer Spectra ◽

57Fe Mossbauer Spectroscopy ◽

Magnetic States ◽

Fe Ions

The ludwigite Co2FeBO5 has been studied experimentally using 57Fe Mössbauer spectroscopy and theoretically by means of the DFT+GGA calculations. The room-temperature Mössbauer spectra are composed of four quadrupole doublets corresponding...

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Mössbauer study of Fe phases in terrestrial olivine basalts from southern Egypt

Mineralogia ◽

10.2478/mipo-2013-0001 ◽

2013 ◽

Vol 44 (1-2) ◽

pp. 3-12 ◽

Cited By ~ 1

Author(s):

Kamaleldin M. Hassan ◽

Julius Dekan

Keyword(s):

Optical Microscopy ◽

Crystal Chemistry ◽

Mössbauer Spectra ◽

Mossbauer Spectroscopy ◽

X Ray Diffraction ◽

Mössbauer Study ◽

Hyperfine Parameters ◽

X Ray ◽

Mossbauer Spectra ◽

Oxidized Iron

AbstractOlivine basalts from southern Egypt were studied by 57Fe Mössbauer spectroscopy at 297 and 77 K, and by optical microscopy and X-ray diffraction. The 57Fe Mössbauer spectra show three-magnetic sextets, three doublets of ferrous (Fe2+), and a weak ferric (Fe3+) doublet that is attributable to a nanophase oxide (npOx). The magnetic sextets relate to titanomagnetite and the Fe2+ doublets to olivine, pyroxene, and ulvöspinel. Variations in the hyperfine parameters of the various Fe components are attributed to changes in the local crystal chemistry. The intensity of oxidation (Fe3+/ΣFe) in the rocks varies from 20-27% with the oxidized iron largely residing in the titanomagnetite.

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X-ray diffraction and Mössbauer spectra of the system Fe2O3-SnO2

Journal of Materials Science Letters ◽

10.1007/bf00723804 ◽

1991 ◽

Vol 10 (4) ◽

pp. 197-200 ◽

Cited By ~ 21

Author(s):

S. Musić ◽

S. Popović ◽

M. Metikoš-Hukovć ◽

V. Gvozdić

Keyword(s):

Mössbauer Spectra ◽

X Ray Diffraction ◽

X Ray ◽

Mossbauer Spectra

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57Fe Mössbauer spectra and magnetic data from the kagomé antiferromagnet H3O-jarosite

ICAME 2005 ◽

10.1007/978-3-540-49853-7_62 ◽

2006 ◽

pp. 1085-1089

Author(s):

P. Bonville ◽

V. Dupuis ◽

E. Vincent ◽

P. E. Lippens ◽

A. S. Wills

Keyword(s):

Mössbauer Spectra ◽

Magnetic Data ◽

57Fe Mössbauer ◽

Mossbauer Spectra

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The method of invariants applied to the analysis of 57Fe Mössbauer spectra

ISIAME 2008 ◽

10.1007/978-3-642-01370-6_76 ◽

2009 ◽

pp. 579-585

Author(s):

K. Szymański ◽

D. Satuła ◽

L. Dobrzyński

Keyword(s):

Mössbauer Spectra ◽

57Fe Mössbauer ◽

Mossbauer Spectra

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Preparation and characterization of iron oxide pillared montmorillonite

Clay Minerals ◽

10.1180/claymin.1988.023.4.04 ◽

1988 ◽

Vol 23 (4) ◽

pp. 367-377 ◽

Cited By ~ 50

Author(s):

D. H. Doff ◽

N. H. J. Gangas ◽

J. E. M. Allan ◽

J. M. D. Coey

Keyword(s):

Magnetic Properties ◽

Iron Oxide ◽

Powder Diffraction ◽

Mössbauer Spectra ◽

Pillared Clay ◽

Cross Linking ◽

X Ray ◽

Pillared Montmorillonite ◽

Mossbauer Spectra

AbstractPillared smectites in which the pillars consist of iron oxide are expected to have interesting and unusual magnetic properties. Several possible routes by which such materials might be made have been investigated, namely intercalation of hydroxy-Fe(III) polycations, mixed hydroxy-Fe(III)/Al polycations, phenanthroline-Fe(II) cations, and trinuclear Fe(III) acetato cations into Na-montmorillonite. Only the last of these yielded a pillared clay (PILC) on calcination. The products have been characterized using X-ray powder diffraction and 57Fe Mössbauer spectroscopy. The precursor Fe-PILC has a d-spacing of 21 Å and expands to 23 Å on solvation with glycol. The calcined Fe-PILC has a d-spacing of 19 Å (gallery height 9·4 Å) and does not expand with glycol, confirming cross-linking of the layers. From Mössbauer spectra at 4·2 K it is estimated that there are of the order of some hundred Fe atoms per pillar.

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