cluster     1   number of spheres in cluster    15
    1  -2.05300  16.28600  18.38900   0.700    1                                
    2  -0.52100  14.61900  19.12100   0.700    2                                
    3  -2.31500  15.57800  17.21600   0.700    3                                
    4  -0.78700  13.92000  17.92800   0.700    4                                
    5  -1.00500  16.57400  20.69200   0.700    5                                
    6  -1.19800  15.79300  19.36600   0.700    6                                
    7  -1.70800  14.37900  16.99000   0.700    7                                
    8  -1.09300  15.71300  21.97400   0.700    8                                
    9  -1.96800  13.68000  15.80700   0.700    9                                
   10  -1.12900  16.60200  23.24300   0.700   10                                
   11  -1.64700  12.39800  15.63300   0.700   11                                
   12  -2.87400  14.15600  15.00600   0.700   12                                
   13  -1.92000  14.70000  22.06800   0.700   13                                
   14  -0.07600  17.22600  23.54900   0.700   14                                
   15  -2.16800  16.63600  23.94800   0.700   15