By definition, it can. I think it wouldn't be useful for batteries though, if that's what you had in mind. The energy density is awful (99.9...% of the mass wil

By definition, it can. I think it wouldn't be useful for batteries though, if that's what you had in mind. The energy density is awful (99.9...% of the mass will be that of the crystal, which is just used as a media, not converted to energy).