cluster     1   number of spheres in cluster     7
    1   5.67200  67.87500  65.79100   0.700    1                                
    2   5.72100  70.22700  66.18400   0.700    2                                
    3   3.63100  69.07300  66.19800   0.700    3                                
    4   4.83800  69.42000  64.12000   0.700    4                                
    5   3.98600  68.38700  63.37700   0.700    5                                
    6   4.95500  69.13800  65.56100   0.700    6                                
    7   4.04000  68.59200  61.55900   0.700    7