R 3 2,NR.155*MJ*
LATT     -3
SYMM     -Y,  X-Y,   Z
SYMM    Y-X,   -X,   Z
SYMM      Y,    X,  -Z
SYMM     -X,  Y-X,  -Z
SYMM    X-Y,   -Y,  -Z
    0 .6666 / 0 .6666 / 0 .1666
    SONDER: X .LE. (1+Y)/2
    SONDER: Y .LE. MIN. (1-X,(1+X)/2)
    R 3 2,NR.155*MJ*