Quadrupole coupling and lattice dynamics of Fe impurities in the transition metal scandium

1981 ◽  
Vol 9 (1-4) ◽  
pp. 267-272 ◽  
Author(s):  
M. Forker ◽  
R. Trzcinski
Keyword(s):  
Transition Metal ◽  
Lattice Dynamics ◽  
Quadrupole Coupling ◽  
Fe Impurities

Lattice Dynamics for Hg1-xMxSe (M - Transition Metal Impurity: Mn, Fe, Co)

1995 ◽  
Vol 182-184 ◽  
pp. 703-706 ◽  
Author(s):  
M. Szuszkiewicz ◽  
E. Dynowska ◽  
J. Gorecka ◽  
J. Kachniarz ◽  
S. Miotkowska ◽  
...  
Keyword(s):  
Transition Metal ◽  
Lattice Dynamics ◽  
Metal Impurity ◽  
Transition Metal Impurity

Sternheimer Antishielding of the Fluorine Ion in Octahedral (MeF6)4-Complexes of Transition Metals from Perturbed Angular-Correlation Measurements

1977 ◽  
Vol 32 (10) ◽  
pp. 1119-1125 ◽  
Author(s):  
C. Bernhardt ◽  
F. W. Richter ◽  
D. Babel
Keyword(s):  
Transition Metal ◽  
Transition Metal Complexes ◽  
Axial Symmetry ◽  
Metal Ion ◽  
Perturbed Angular Correlation ◽  
Fluorine Nucleus ◽  
Quadrupole Coupling ◽  
Complexes Of Transition Metals ◽  
Nuclear Quadrupole ◽  
Antishielding Effect

Sternheimer antishielding factors of fluorine in octahedral transition metal complexes have been determined from nuclear quadrupole coupling data derived from differential perturbed angularcorrelation measurements taking into account ionic and covalent contributions to the electric field gradient at the fluorine nucleus. It has been found that the antishielding effect increases with increasing d-occupation in the metal ion, but is different for perovskite and rutile complexes and cannot be described by a scalar factor for the F--ions in rutile fluorides, where the fluor position is of less than axial symmetry

Lattice dynamics of transition metal disilicides

1998 ◽  
Author(s):  
O. Chaix-Pluchery ◽  
J. Bossy ◽  
H. Schoberb ◽  
U. Gottlieb ◽  
O. Laborde ◽  
...  
Keyword(s):  
Transition Metal ◽  
Lattice Dynamics

121Sb Mössbauer Spectra of Hypervalent Complexes Having an Antimony-transition Metal Bond and Partial Quadrupole Coupling Constants

2002 ◽  
Vol 57 (6-7) ◽  
pp. 631-639 ◽  
Author(s):  
Masashi Takahashi ◽  
Atsushi Ishiguro ◽  
Masaki Maeda ◽  
Masuo Takeda ◽  
Koichiro Toyota ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Transition Metal ◽  
Mössbauer Spectra ◽  
Coupling Constants ◽  
Metal Bond ◽  
Mossbauer Spectra ◽  
Electronic Feature ◽  
Quadrupole Coupling ◽  
Related Compounds ◽  
Donor Power

Antimony-121 Mössbauer spectra for hypervalent pentacoordinate antimony compounds having Sb-transition metal bond [Rf2SbMCp(CO)n {RfH = o-C6H4C(CF3)2OH- , M = Fe, Ru, Cr,Mo, W}, Rf2SbFeCp(CO)PPh3, Rf2SbFeCp(dppe)] and closely related compounds Rf2SbTol (Tol = p-CH3C6H4), Rf2SbX (X = Cl, Br) are described. The strong -donor power of the metal fragments is demonstrated by theM¨ossbauer parameters. The -donor power decreases in the order FeCp(dppe) > FeCp(CO)PPh3 > FeCp(CO)2 > RuCp(CO)2 > CrCp(CO)3 > MoCp(CO)3 > WCp(CO)3 ≫Tol. The essential trends in the molecular structure and the Berry pseudorotation are interpreted by this order. In addition, the e2qQ values for 32 hypervalent antimony compounds are successfully calculated using the additivity model for the e2qQ value. A unique electronic feature for Rf2SbX is clarified through the calculation

Lattice dynamics study of AlB2-type 4d transition-metal diborides by extended X-ray-absorption fine structure

2006 ◽  
Vol 75 (11) ◽  
pp. 2080-2084 ◽  
Author(s):  
Wangsheng Chu ◽  
Ziyu Wu ◽  
Wenhan Liu ◽  
N.L. Saini ◽  
A. Bianconi ◽  
...  
Keyword(s):  
Fine Structure ◽  
Transition Metal ◽  
Lattice Dynamics ◽  
X Ray ◽  
Absorption Fine ◽  
Metal Diborides ◽  
X Ray Absorption ◽  
Transition Metal Diborides
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