Computation of the Cohesive Energies of NaCl, SiO2 and Al Using Density Functional Theory
Aungwa Francis, S. G. Abdu, Ali Haruna, Eli Danladi
Physical Science International Journal · pp. 1–9 · Published 13 Aug 2016
10.9734/PSIJ/2016/26479Abstract
In this paper, the cohesive energies of Sodium Chloride (NaCl), Silicon dioxide (SiO2) and Alum inum (Al) based on computer code FHI-aims were calculated using Density Functional Theory. The code has several input parameters in which some of the variables were optimized. The cohesive energies of NaCl, SiO2 and Al were calculated within Local Density Approximation (LDA) of Perdew Wang of the density functional theory. The results obtained from the computation of the cohesive energies of NaCl, SiO2 and Al were 8.38 eV, 12.32 eV and 3.64 eV respectively which is in good agreement when compared to the experimental values of 8.18,12.94 and 3.39eV for NaCl, SiO2 and Al respectively. These energies are within reasonable percentage errors of 2.4%, 4.8% and 6.9% respectively.
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