cluster     1   number of spheres in cluster    15
    1  -5.51000   4.34700  14.60300   0.700    1                                
    2  -3.38000   3.31400  14.66000   0.700    2                                
    3  -6.03600   3.32900  15.37400   0.700    3                                
    4  -3.88700   2.23900  15.37700   0.700    4                                
    5  -3.67500   5.50100  13.40700   0.700    5                                
    6  -2.39200   6.10300  13.89800   0.700    6                                
    7  -4.17300   4.38100  14.25400   0.700    7                                
    8  -5.22500   2.26200  15.76300   0.700    8                                
    9  -1.78800   7.20100  13.05500   0.700    9                                
   10  -5.40500  -0.43800  16.11900   0.700   10                                
   11  -0.56200   7.21800  12.80700   0.700   11                                
   12  -2.50900   8.12800  12.65100   0.700   12                                
   13  -7.34100   1.05600  16.60700   0.700   13                                
   14  -5.34500   1.13200  18.06800   0.700   14                                
   15  -5.90900   0.94300  16.74000   0.700   15