Electronic structure of alkaline metal hydrides according to MO LCAO-SCF-CNDO cluster calculations

1997 ◽  
Vol 38 (3) ◽  
pp. 352-357
Author(s):  
E. A. Zharikova ◽  
A. I. Ermakov ◽  
R. P. Ozerov
Keyword(s):  
Electronic Structure ◽  
Metal Hydrides ◽  
Alkaline Metal ◽  
Cluster Calculations

THE ADSORPTION AND BONDING OF H2S ON THE α-FeOOH(110) SURFACE

2007 ◽  
Vol 14 (02) ◽  
pp. 209-217 ◽  
Author(s):  
S. SIMONETTI ◽  
D. DAMIANI ◽  
A. JUAN ◽  
G. BRIZUELA
Keyword(s):  
Electronic Structure ◽  
Density Of States ◽  
Minimum Energy ◽  
Stable Configuration ◽  
Molecular Adsorption ◽  
Cluster Calculations

The electronic structure of H 2 S adsorbed on the goethite (110) surface has been studied by ASED-MO cluster calculations. We have studied both the perpendicular and the parallel H 2 S molecular adsorption on the FeOOH (110) surface. We have analyzed the adsorption configuration energies including rotation. The parallel species does not rotate during adsorption and corresponds to the most stable configuration. We have also studied the bonding contributions for the minimum energy configuration and the density of states plots.

Crystal excitation: survey of many-electron Hartree-Fock calculations of self-trapped excitons in insulating crystals

1992 ◽  
Vol 341 (1661) ◽  
pp. 221-231 ◽  
Keyword(s):  
Electronic Structure ◽  
Alkali Halides ◽  
Oxide Materials ◽  
Theoretical Methods ◽  
Hartree Fock ◽  
Cluster Calculations ◽  
Quantum Cluster ◽  
Similarities And Differences

To model successfully the diversity of electronic structure exhibited by excitons in alkali halides and in oxide materials, it is necessary to use a variety or combination of theoretical methods. In this review we restrict our discussion to the results of embedded quantum cluster calculations. By considering the results of such studies, it is possible to recognize the general similarities and differences in detail between the various exciton models in these materials.

Electronic Structure and Hydrogen Desorption in NaAlH4

2004 ◽  
Vol 837 ◽  
Author(s):  
S. Li ◽  
P. Jena ◽  
C. M. Araujo ◽  
R. Ahuja
Keyword(s):  
Electronic Structure ◽  
First Principles ◽  
Density Functional ◽  
Metal Hydrides ◽  
Hydrogen Desorption ◽  
Light Metal ◽  
First Principles Calculations ◽  
Functional Theory ◽  
Design And Synthesis

ABSTRACTFirst principles calculations based on gradient corrected density functional theory are carried out to understand the electronic structure and mechanisms responsible for desorption of hydrogen from Ti doped and vacancy containing sodium-alanate (NaAlH4). The energy necessary to remove a hydrogen atom from Ti doped NaAlH4 is significantly smaller than that from pristine NaAlH4 irrespective of whether Ti substitutes the Na or the Al site. However, the presence of Na and Al vacancies is shown to play an even more important role: The removal of hydrogen associated with both Na and Al vacancies is found to be exothermic. It is suggested that this role of vacancies can be exploited in the design and synthesis of complex light metal hydrides suitable for hydrogen storage.

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