Stoichiometry of Anti-Fluorite Corner Atoms (8*1/8=1)、 Face Atoms (6*112=3) Ta Holes (8*1=8) 4 Lattice Anions:8 Tetrahedral Cations 1:2 Stoichiometry (Li2O,Na2O,Li2S) XIlI-3Stoichiometry of Anti-Fluorite 4 Lattice Anions: 8 Tetrahedral Cations 1:2 Stoichiometry (Li2O, Na2O, Li2S) Corner Atoms (8 * 1/8 = 1) Face Atoms (6 * 1/2 = 3) Td Holes (8 * 1 = 8) XIII-3