Environment around Li in theLiAlSiO4ionic conductor glass: A neutron-scattering and reverse Monte Carlo study

The environment around Li in a ${\mathrm{LiAlSiO}}_4$ glass has been studied by neutron scattering with isotopic substitution of Li and reverse Monte Carlo modeling. Li atoms are found in distorted tetrahedral sites which are edge-linked with ${\mathrm{}(\mathrm{S}\mathrm{i},\mathrm{A}\mathrm{l})\mathrm{O}}_4$ tetrahedra and with a first Li-Li distance near 5 Å. The increase in the activation energy for ionic conduction from the aluminosilicate to the silicate glasses is explained by the structural differences.