The ‘bare’ Sn2+ion. X-Ray crystal structure and Mössbauer spectrum of (Sn2+)-(SbF6–)2(AsF3)2

1984 ◽  
pp. 50-51 ◽  
Author(s):  
Anthony J. Edwards ◽  
Khalaf I. Khallow
Keyword(s):  
Crystal Structure ◽  
Mossbauer Spectrum ◽  
Mössbauer Spectrum ◽  
X Ray

S5N5[SnCl5(CH3CN)]; Synthese, IR-Spektrum, 119Sn-Mößbauer-Spektrum und Kristallstruktur / S5N5[SnCl5(CH3CN)]; Synthesis, IR Spectrum , Mössbauer Spectrum and Crystal Structure

1986 ◽  
Vol 41 (10) ◽  
pp. 1191-1195 ◽  
Author(s):  
Ute Patt-Siebel ◽  
Somluck Ruangsuttinarupap ◽  
Ulrich Müller ◽  
Jürgen Pebler ◽  
Kurt Dehnicke
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Ir Spectrum ◽  
Bond Angle ◽  
Mossbauer Spectrum ◽  
Monoclinic Space Group ◽  
Mössbauer Spectrum ◽  
X Ray ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral

S5N5[SnCl5(CH3CN)] is prepared by the reaction of SnCl2 with trithiazyl chloride in acetonitrile suspension. The compound is characterized by its IR spectrum, the 119Sn Mössbauer spectrum and by an X-ray crystal structure determination (1851 observed, independent reflexions, R = 0.024). S5N5[SnCl5(CH3CN)] crystallizes in the monoclinic space group P21/n with Z = 4 and the lattice dimensions a = 758.8; b = 1574.6; c = 1429.1 pm; β = 97.65°. The compound consists of planar S5N5® cations with the azulene-like structure, and anions [SnCl5(CH3CN)]e in which the tin atom has a distorted octahedral coordination. The bond angle Sn-N ≡ C (168°) is surprisingly small.

Gold(I)-Bis(diphenylphosphino)amid und einige Gold(I)-Bis(diarylphosphino)methanide mit sterisch anspruchsvollen Arylsubstituenten / Gold(I)-bis(diphenylphosphino)amide and Some Gold(I)-bis(diarylphosphino)methanides with Bulkyl Aryl Substituents

1983 ◽  
Vol 38 (1) ◽  
pp. 62-66 ◽  
Author(s):  
Hubert Schmidbaur ◽  
Stefan Schnatterer ◽  
Kailash C. Dash ◽  
Aref A. M. Aly
Keyword(s):  
Spectroscopic Data ◽  
Ring Structure ◽  
Mossbauer Spectrum ◽  
X Ray Diffraction ◽  
Mössbauer Spectrum ◽  
X Ray ◽  
Molar Ratios ◽  
Tertiary Phosphines ◽  
Deep Yellow

Intensely yellow coloured, insoluble gold(I)-bis(diarylphosphino)amides, [(C6H5)P2NAu, 1, is obtained from lithiated bis(diphenylphosphino)amine and AuCl complexes of tertiary phosphines. 1 is assigned a dimeric eightmembered ring structure on the basis of its 197Au-Mößbauer spectrum and of a direct analogy with the corresponding bis(phosphino)methanide complexes, whose structure has recently been confirmed by X-ray diffraction. A series of mono- and binuclear AuCl complexes of bis(diarylphosphino)methanes bearing bulky 2-tolyl or 2,6-dimethylphenyl substituents (3a, b) was synthesized from the diphosphines and (CO)AuCl in the molar ratios 1:2 or 1:1. The compounds have structures 4 a, b and oa, b, respectively. An ionic tetrafluoroborate derivative 6 b was obtained from the chloride 5 b on treatment with AgBF4. Lithiation of the diphosphinomethanes 3 a, b using LiCH3 followed by reaction with CIAuPR3 complexes yields the deep-yellow Au(I) bis(diarylphosphino)methanides 7 a, b. All compounds, including the new ligand 3b and its precursor (2,6-(CH3)2C6H3)2PBr, 2, were characterized by analytical and spectroscopic data.

scholarly journals Local structures and electronic band states of α−Fe2O3 polycrystalline particles in the glazes of the HIZEN celadons produced in the Edo period of Japan, by means of X-ray absorption spectra (II)

Cerâmica ◽  
2011 ◽  
Vol 57 (342) ◽  
pp. 155-165 ◽  
Author(s):  
M. Hidaka ◽  
K. Ohashi ◽  
R. P. Wijesundera ◽  
L. S. R. Kumara ◽  
S. Sugihara ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Glassy State ◽  
Transition Metal Ions ◽  
Mossbauer Spectrum ◽  
Edo Period ◽  
Electronic Band ◽  
Mössbauer Spectrum ◽  
X Ray ◽  
Fine Powders ◽  
X Ray Absorption

HIZEN celadon glazes produced in 1630's to 1790's (Edo period, Japan) have been investigated by means of X-ray absorption spectra (XAS) near a Fe-K edge by using synchrotron radiation and a Mössbauer spectrum. The XAS suggest that the local structure around Fe2O3 fine powders is slightly different between the Izumiyama ceramics of mainly the Quartz-SiO2 and Ohkawachi ceramics of mainly the feldspar of (K,Na)Si3O8 (Sanidine), and that the glazes of the HIZEN celadons include the Fe2O3 fine powders in the glassy state, though the X-ray diffraction patterns of the glassy celadon glazes do not show any peaks of the Fe2O3 structure. The Mössbauer spectrum suggests that the celadon glaze of Seiji (m) includes only Fe3+ ions, but not Fe2+ ions. This indicates the existence of Fe2O3 in the celadon glaze. It is interpreted that the colored brightness of the HIZEN celadons is induced by the structural properties of the used raw celadon ceramics and the other transition-metal ions of Cr, Cu, Zn in the celadon glazes, but not by the chemical reaction from Fe2O3 to FeO under the deoxidizing thermal treatment at higher temperature in a kiln.

Crystal structure, Tc, magnetic properties and Mössbauer spectrum of Fe-doped GdBa2Cu3O7−δ

1989 ◽  
Vol 159 (3) ◽  
pp. 188-194 ◽  
Author(s):  
S.T. Lin ◽  
C.L. Lin ◽  
K.C. Lin ◽  
C. Tien ◽  
I.M. Jiang
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Mossbauer Spectrum ◽  
Mössbauer Spectrum

Effect of the Milling Conditions on the Formation of Nanostructured Fe–Al Powders

2011 ◽  
Vol 214 ◽  
pp. 490-497 ◽  
Author(s):  
Zineb Hamlati ◽  
A. Guittoum ◽  
S. Bergheul ◽  
N. Souami ◽  
K. Taibi ◽  
...  
Keyword(s):  
Hyperfine Field ◽  
Milling Time ◽  
High Energy ◽  
Lattice Parameter ◽  
Paramagnetic Phase ◽  
Mossbauer Spectrum ◽  
Alloy Formation ◽  
Mössbauer Spectrum ◽  
X Ray ◽  
A Value

Nanocrystalline Fe72Al28 alloy samples were prepared by the mechanical alloying process using planetary high-energy ball mill. The alloy formation and different physical properties were investigated as a function of milling time, t, (in the 0-24 h range) by means of the X-ray diffraction (XRD) technique, scanning electron microscopy (SEM), energy dispersive X-ray (EDAX) and Mössbauer spectroscopy. The complete formation of bcc-FeAl solid solution is observed after 4 h of milling. The lattice parameter, a (nm), quickly increases within the first hours of milling and reaches a maximum value of 0.291 nm at 12 h of milling time; then a (nm) decreases to a value of 0.2885 nm for 24 h. The grain size decreases from 55 to 10 nm, while the strain increases from 0.18% to 0.88%. Grain morphologies at different formation stages were observed by SEM. The Mössbauer spectra show different behaviors with the increase of milling time. Indeed, after 4 h, the Mössbauer spectrum shows the presence of a singlet and sextet. The singlet indicates the presence of paramagnetic phase characteristic of A2 disordered structure and the sextet with a mean hyperfine field, , of 21 T is indicative of ordered DO3 structure. After 8 h of milling, the paramagnetic phase disappears leading to the appearance of a sextet, with a mean hyperfine field, Hhf, equal to 24.18 T which is characteristic of DO3’ structure. For the higher milling time i.e. 24 h, the Mössbauer spectrum was analyzed with two components. The first one with equal to 29.9 T is still indicative of ordered DO3, however, the second with a value of 10.25 T is characteristic of the fine domain B2 ordered structure.

scholarly journals Verteilung und Valenz der Kationen im Spinellsystem ZnFeGaO4-Fe2GaO4 / Distribution and Valence of the Cations in the Spinel System ZnFeGaO4-Fe2GaO4

1996 ◽  
Vol 51 (1) ◽  
pp. 47-51 ◽  
Author(s):  
Sima Rabbani ◽  
Erwin Riedel
Keyword(s):  
High Temperature ◽  
Single Line ◽  
Mossbauer Spectrum ◽  
Iron Ions ◽  
Mössbauer Spectrum ◽  
X Ray ◽  
Lattice Constants ◽  
Octahedral Sites ◽  
Tetrahedral Sites ◽  
Spinel System

For the spinel system Zn1-ϰFe-λGaϰ-λ(Fe1+λGa1-λ)O4 the index λ has been determined by X-ray measurements: λ = 0 in the region 0 ≤ ϰ ≤ 0,35; the increase of λ to 0,62 within 0,35 ≤ χ ≤ 1 is nearly linear. The distribution of Fe2+ and Fe3+ ions over the lattice sites has been derived from lattice constants and ionic distances, and also by Mössbauer spectroscopy. In the spinels with ϰ < 0,3 the tetrahedral sites are preferably occupied by Fe2+ ions, for x > 0,5 Fe3+ ions dominate. At ϰ = 0,4 the occupation of the lattice sites by iron ions is statistical, the high temperature Mössbauer spectrum shows a single line only. All spinels are n-type hopping conductors mainly conducting via the octahedral sites.

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