H =

     2     2     0
     0     2     0
     0     0     2

>> rH

rH =

   -0.5547   -0.5547   -0.0000
    0.0000   -0.5547   -0.0000
   -0.0000    0.0000   -0.2774

>> H/rH

ans =

   -3.6056   -0.0000    0.0000
   -0.0000   -3.6056    0.0000
    0.0000   -0.0000   -7.2111