Short-Range Order and Site Connectivities in Sodium Aluminoborate Glasses:  I. Quantification of Local Environments by High-Resolution11B,23Na, and27Al Solid-State NMR

1998 ◽  
Vol 102 (23) ◽  
pp. 4495-4506 ◽  
Author(s):  
Lars Züchner ◽  
Jerry C. C. Chan ◽  
Werner Müller-Warmuth ◽  
Hellmut Eckert
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Local Environments

Five- and six-fold coordinated silicon in silicodiphosphonates: short range order investigation by solid-state NMR spectroscopy

2020 ◽  
Vol 44 (11) ◽  
pp. 4613-4620 ◽  
Author(s):  
Christine Viehweger ◽  
Janine Kowalke ◽  
Erica Brendler ◽  
Sandra Schwarzer ◽  
Claudia Vogt ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Short Range ◽  
Short Range Order ◽  
Chemical Shifts ◽  
Range Order ◽  
Solid State Nmr Spectroscopy

Silicodiphosphonates synthesized by two different pathways show interesting chemical shifts of five- and sixfold coordinated silicon.

31P solid-state NMR studies of the short-range order in phosphorus–selenium glasses

2010 ◽  
Vol 12 (7) ◽  
pp. 1535 ◽  
Author(s):  
Aleksei Bytchkov ◽  
Franck Fayon ◽  
Dominique Massiot ◽  
Louis Hennet ◽  
David L. Price
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Nmr Studies

Microstructural and chemical effects in Al2O3 implanted with iron at 77 K and annealed in oxidizing or reducing atmospheres

1991 ◽  
Vol 6 (10) ◽  
pp. 2160-2177 ◽  
Author(s):  
C.J. McHargue ◽  
P.S. Sklad ◽  
C.W. White ◽  
J.C. McCallum ◽  
A. Perez ◽  
...  
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Near Neighbor ◽  
Range Order ◽  
Annealing Atmosphere ◽  
Iron Aluminum ◽  
Local Environments ◽  
Amorphous Zone ◽  
Amorphous Surface ◽  
Kinetics Of

Implantation of Fe (160 keV) into α–Al2O3 at 77 K produces an amorphous surface layer for fluences in the range of 1016 to 1017 Fe/cm2. Measurements of short-range order were made by extended energy loss fine structure analysis (EXELFS). The structure of amorphous Al2O3 produced by implantation of iron at 77 K exhibits short-range order that differs from that produced by stoichiometric (Al + O) implants. This difference is manifested by changes in the Al–O near-neighbor bond length. The local environments of implanted iron were determined from conversion electron Mössbauer spectroscopy (CEMS). The iron resides in several different local environments consistent with the electronic states of Fe2+, Fe4+, and Fe0. The relative amount of each environment depends upon the concentration (fluence) of the implanted iron ions. Regrowth of the amorphous zone during annealing occurs in the sequence amorphous → γ–Al2O3 ↠ α–Al2O3. The kinetics of regrowth and phase separation vary with implanted fluence and with annealing atmosphere. The higher the concentration of implanted iron, the slower the formation of iron-aluminum oxide precipitate phases in oxidizing atmospheres and α–Fe precipitates in reducing atmospheres.

Short-range order effects in amorphous FexSi1-x/Si multilayers induced by preparation conditions

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-175-Pr2-178 ◽  
Author(s):  
G. T. Pérez ◽  
F. H. Salas ◽  
R. Morales ◽  
L. M. Álvarez-Prado ◽  
J. M. Alameda
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Order Effects ◽  
Preparation Conditions
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