This "crystal" makes use of several tricks. Use point group "2", monoclinic, and axes 1 : 1 : 0.577, with BETA=90. This is not the true axial ratio of rutile, but is chosen so that the individuals just touch and do not overlap. The real forms which will be shown are {100} and {110}, but you must enter:
1) {100} 1.0
2) {010} -1.0
3) {0-10} 3.0
4) {1-10} 2.4749
5) {110} -0.3536
6) {001} 2.5
Note that the distances for forms 2) and 5) are negative - this causes the crystal to be drawn to the left of the center. The twins are type Contact, five successive rotations by 60 degrees about axis [100], with composition planes (011) and (01-1).