C M C M,NR.63*BE,GC*
LATT 7
SYMM       X,   -Y,  -Z
SYMM       X,    Y,.5-Z
SYMM       X,   -Y,.5+Z
    0 .5 / 0 .5 / 0 .25
    C M C M,NR.63*BE,GC*