cluster     1   number of spheres in cluster    18
    1  -2.96000  18.14800  20.94600   0.700    1                                
    2  -0.99600  12.32400  17.70800   0.700    2                                
    3  -0.39400  12.81900  18.85900   0.700    3                                
    4  -2.16500  14.40300  17.43700   0.700    4                                
    5  -1.84800  16.20900  18.97500   0.700    5                                
    6  -1.88300  13.11900  16.98900   0.700    6                                
    7  -0.67400  14.10700  19.29900   0.700    7                                
    8  -1.56600  14.90200  18.58500   0.700    8                                
    9  -1.57600  18.19200  20.29700   0.700    9                                
   10  -0.57400  18.80000  21.28000   0.700   10                                
   11  -2.59800  13.00800  14.59900   0.700   11                                
   12  -2.80800  12.01900  13.73300   0.700   12                                
   13  -2.55400  14.26100  14.15800   0.700   13                                
   14  -1.17300  16.82800  19.92300   0.700   14                                
   15  -2.45200  12.69600  15.86300   0.700   15                                
   16  -0.06800  14.58500  20.41900   0.700   16                                
   17   0.43900  18.12200  21.55900   0.700   17                                
   18  -0.84400  19.93500  21.73000   0.700   18