P C C A,NR.54*CS,CZ*
LATT  1
SYMM  0.5-X,-Y,Z
SYMM  0.5+X,-Y,0.5-Z
SYMM  -X,Y,0.5-Z
    0 .5 / 0 .5 / 0 .5
    P C C A,NR.54*CS,CZ*