cluster     1   number of spheres in cluster     4
    1  -5.78600   0.34500  16.96800   0.700    1                                
    2  -5.08600  -0.65400  16.43700   0.700    2                                
    3  -6.78600   0.77900  16.29800   0.700    3                                
    4  -5.46700   0.81200  18.06300   0.700    4