The CAD system was Blender 3D to make this model of carbon. Nuclear   
   magnetic resonance works with C-13 but not C-12.   
   The CAD models of those two isotopes are ready to compare.   
   https://www.thingiverse.com/thing:3860671   
      
   The extra neutron changes the moment of inertia, something not   
   used in standard nuclear science. The static nucleus theory   
   affects chemistry.   
   https://pyramidalcube.blogspot.com/2017/08/periodic-table-of-sha   
   es-of-nuclei.html   
      
      
   Thingiverse has the model files.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)