cluster     1   number of spheres in cluster     9
    1  -2.00700   6.35400  19.92500   0.700    1                                
    2  -1.24000   7.43300  19.36600   0.700    2                                
    3  -3.35300   6.57900  20.34300   0.700    3                                
    4  -1.82800   8.73500  19.22900   0.700    4                                
    5  -3.94500   7.88300  20.20700   0.700    5                                
    6  -3.19000   8.97500  19.64800   0.700    6                                
    7  -3.82200  10.36700  19.49800   0.700    7                                
    8  -3.05500  11.40300  19.22000   0.700    8                                
    9  -5.12200  10.51000  19.63900   0.700    9