I B C A,NR.73*CS,CZ*
LATT  2
SYMM  X,-Y,0.5-Z
SYMM  0.5-X,Y,-Z
SYMM  -X,0.5-Y,Z
    0 .25 / 0 .5 / 0 .5
    I B C A,NR.73*CS,CZ*