LiCaN and Li₄SrN₂, Derivatives of the Fluorite and Lithium Nitride Structures

The list of known ternary nitrides of lithium has been extended by two through the investigation of LiCaN and Li4SrN2. In the case of LiCaN, infinitely long math image[LiN3/3] bands are joined through common nitrogen atoms with CaN4 tetrahedra to give a structural unit that can be derived directly from the fluorite structure: “Li[4]Ca[4]N[8]” [RIGHTWARDS ARROW] Li[3]Ca[4]N[1] (see illustration)