cluster     1   number of spheres in cluster    18
    1  -4.06100   7.23400  11.12400   0.700    1                                
    2  -0.26200   4.35700  12.53300   0.700    2                                
    3  -4.70300   5.52100  13.27200   0.700    3                                
    4  -2.56900   3.89400  13.98900   0.700    4                                
    5  -6.32900   4.00800  14.28100   0.700    5                                
    6  -6.44000   3.22100  15.56900   0.700    6                                
    7  -4.10500   2.17500  15.07800   0.700    7                                
    8  -4.91300   4.32900  13.96900   0.700    8                                
    9  -3.84700   3.51100  14.33200   0.700    9                                
   10  -3.41000   5.89700  12.93200   0.700   10                                
   11  -2.34600   5.08200  13.29600   0.700   11                                
   12  -5.29100  -0.40100  16.18100   0.700   12                                
   13  -5.30800   2.31400  15.93200   0.700   13                                
   14  -5.23600   1.21400  18.07100   0.700   14                                
   15  -7.34500   0.94800  16.70300   0.700   15                                
   16  -3.17100   7.07000  12.25400   0.700   16                                
   17  -1.07600   5.46000  12.96300   0.700   17                                
   18  -5.85200   0.96200  16.76500   0.700   18