P M N A,NR.53*CS,CZ*
LATT  1
SYMM  X,-Y,-Z
SYMM  0.5-X,Y,0.5-Z
SYMM  0.5-X,-Y,0.5+Z
    0 .5 / 0 1 / 0 .25
    P M N A,NR.53*CS,CZ*