cluster     1   number of spheres in cluster     4
    1   5.56500  62.02300  61.93900   0.700    1                                
    2   5.30900  64.69300  62.15500   0.700    2                                
    3   4.17300  63.48300  60.19900   0.700    3                                
    4   5.37500  63.61000  61.10300   0.700    4