I B A 2,NR.45*CS,CZ*
LATT  -2
SYMM  -X,-Y,Z
SYMM  -X,Y,0.5+Z
SYMM  X,-Y,0.5+Z
    0 .5 / 0 .5 / 0 .5
    I B A 2,NR.45*CS,CZ*