cluster     1   number of spheres in cluster    15
    1 -12.30900  12.84600   7.66800   0.700    1                                
    2 -12.36400  11.22500   9.49800   0.700    2                                
    3  -9.75000  10.10700   9.15500   0.700    3                                
    4 -11.23000   9.56600   6.53100   0.700    4                                
    5 -10.38600  11.18500   8.16400   0.700    5                                
    6 -10.09100  10.64900   6.79900   0.700    6                                
    7  -8.69100  10.13100   7.02300   0.700    7                                
    8 -11.75600  11.77000   8.51800   0.700    8                                
    9 -11.22600   9.12400   5.06000   0.700    9                                
   10  -7.59400  11.18500   6.71000   0.700   10                                
   11  -8.57500   9.59900   8.35700   0.700   11                                
   12 -10.55600   9.77700   4.23200   0.700   12                                
   13  -7.75200  11.85600   5.66000   0.700   13                                
   14 -11.94400   8.14400   4.80600   0.700   14                                
   15  -6.66600  11.25600   7.54300   0.700   15