cluster     1   number of spheres in cluster    15
    1  -3.27000   3.50500  14.84400   0.700    1                                
    2  -5.41600   4.55800  14.81300   0.700    2                                
    3  -3.79100   2.43600  15.57400   0.700    3                                
    4  -5.94500   3.47500  15.50000   0.700    4                                
    5  -3.51600   5.69300  13.59200   0.700    5                                
    6  -2.62300   6.53100  14.49000   0.700    6                                
    7  -1.38600   8.45600  13.87500   0.700    7                                
    8  -4.08900   4.57400  14.45500   0.700    8                                
    9  -5.14900   2.41500  15.89900   0.700    9                                
   10  -5.29600  -0.27400  16.26300   0.700   10                                
   11  -1.85700   7.28300  13.46500   0.700   11                                
   12  -1.37700   8.74500  15.09800   0.700   12                                
   13  -5.28000   1.24600  18.16300   0.700   13                                
   14  -7.25100   1.21700  16.73100   0.700   14                                
   15  -5.83900   1.07500  16.86300   0.700   15