Inorganic　electride　[Ca24Al28O64](4+)(4e(-))　was　successfully　synthesized　via　a　reaction　of　Ca12Al14O33　(C12A7),　Ca3Al2O4　(C3A),　and　Al　powder　at　1050　degrees　C　for　5　minutes　heated　by　SPS　system.　The　as-prepared　polycrystalline　C12A7:e(-)　electride　exhibits　an　electron　concentration　of　2.3　x　10(21)　cm(-3)　and　an　optical　absorption　bands　at　2.5ev　under　room　temperature.　Electron　concentration　was　also　determined　by　thermogravimetry　(TG)　and　differential　thermal　analysis　(DTA).　Furthermore,　the　molecular　structure　was　investigated　by　Micro　Raman　measurements;　the　appearance　of　the　band　at　186　cm(-1)　strongly　suggested　the　formation　of　C12A7:e(-)　electride.　These　results　not　only　suggest　a　novel　precursor　for　fabricating　mayenite　electrides　but　also　make　it　possible　to　produce　efficiently　the　electride　in　large　volume.