cluster     1   number of spheres in cluster    18
    1  -3.53700   7.41600  12.45000   0.700    1                                
    2  -1.17200   3.21700  11.83900   0.700    2                                
    3  -4.02400   2.16300  15.05100   0.700    3                                
    4  -2.45600   5.34700  13.45500   0.700    4                                
    5  -3.79500   3.43400  14.43500   0.700    5                                
    6  -5.29700   2.12800  15.65100   0.700    6                                
    7  -4.92200   4.28200  14.55700   0.700    7                                
    8  -3.71000   5.94400  12.83600   0.700    8                                
    9  -2.54800   3.80700  13.70100   0.700    9                                
   10  -5.32600  -0.65300  16.12700   0.700   10                                
   11  -2.52400   3.09100  12.40300   0.700   11                                
   12  -6.21600   6.22300  13.43200   0.700   12                                
   13  -4.59200   6.69400  15.22300   0.700   13                                
   14  -7.29600   0.88300  16.65100   0.700   14                                
   15  -5.28600   1.03500  18.01400   0.700   15                                
   16  -6.12200   3.60200  15.51800   0.700   16                                
   17  -4.96900   5.90700  14.07300   0.700   17                                
   18  -5.86300   0.90300  16.71400   0.700   18