cluster     1   number of spheres in cluster     4
    1   5.74400  61.80000  61.52800   0.700    1                                
    2   4.20600  63.37000  60.01900   0.700    2                                
    3   5.37100  64.40000  61.82100   0.700    3                                
    4   5.45800  63.39700  60.78300   0.700    4