cluster     1   number of spheres in cluster     7
    1  28.61500  14.03500  18.23300   0.700    1                                
    2  27.99400  15.26300  18.47000   0.700    2                                
    3  29.27100  13.86900  17.00800   0.700    3                                
    4  28.11300  16.15700  17.46200   0.700    4                                
    5  29.36100  14.83000  16.03500   0.700    5                                
    6  28.73500  16.04900  16.22800   0.700    6                                
    7  28.80800  17.08100  15.21200   0.700    7