cluster     1   number of spheres in cluster     4
    1  60.09000  -5.61800  -1.87900   0.700    1                                
    2  60.50400  -4.03400   0.32300   0.700    2                                
    3  60.46400  -6.74800   0.55800   0.700    3                                
    4  61.00600  -5.62200  -0.33400   0.700    4