The Li-Si-(O)-N system revisited: Structural characterization of Li21Si3N11 and Li7SiN3O

A systematic study of the Li-Si-(O)-N system is presented. Li21Si3N11 crystallizes as a superstructure of the anti-fluorite structure with Li and Si ordering, Li7SiN3O exhibits the anti-fluorite structure with both anion and cation disorder.