Lithium beryllide is a hypothetical intermetallic compound of lithium and beryllium that may have several possible compositions, including LiBe, LiBe₂, Li₂Be, LiBe₃, Li₃Be, Li₂Be₃, Li₃Be₂, LiBe₄ and Li₄Be. Computational methods indicate that some of these compositions may be superconductive under very high pressure and low temperature.