B2/b 4 0.00000 0.00000 0.00000 1. 0. 0. 0. 1. 0. 0. 0. 1. 0. -1. 0. -1. 0. 0. 0. 0. -1. -1. 0. 0. 0. -1. 0. 0. 0. -1. 0. 1. 0. 1. 0. 0. 0. 0. 1. 0.00000 0.00000 0.00000 0.00000 0.00000 0.50000 0.00000 0.00000 0.00000 0.00000 0.00000 0.50000 x y z -y -x 1/2-z -x -y -z y x 1/2+z