P -3,NR.147*CB*
LATT        1
SYMM      -Y,   X-Y,   Z
SYMM     Y-X,    -X,   Z
    0 .6666 / 0 .6666 / 0 .5
    SONDER: X .LE. (1+Y)/2
    SONDER: Y .LE. MIN. (1-X,(1+X)/2)
    P -3,NR.147*CB*