(0.0,0 (0,0,0) (1/2,12,12) P (00,0 (0,0,0) 1/2,1/2,0) (1/2,12,0 1/2。0,1/2) (0,12,1/2) FP I F C (0,0,0) (0,0,0) (1/2,1/2,1/2) (0,0,0) (1/2,1/2,0) (1/2,0,1/2) (0,1/2,1/2) (0,0,0) (1/2,1/2,0)