Study of the Chemical Bond in Li2 – yFe1 – xMnxSiO4 (x = 0.0, 0.5, 1.0; y = 0.0, 2.0) by the Method of Computer Simulation

Abstract

The electron structure of Li₂MnSiO₄ and Li₂FeSiO₄ in a layered orthorhombic crystal structure of Pmn2₁ is studied by the electron density functional method. Using the analysis of the density of crystal orbital Hamilton populations (COHPs), the features of chemical bond formation in these substances are studied. Anisotropy of the chemical bond of Mn with oxygen atoms is observed for Li₂MnSiO₄ with the complete extraction of lithium atoms from the structure. The formation of anisotropy of the chemical bond can indicate that Mn is trying to change the coordination and the beginning of the restructuring of the compound structure and its reduced stability.