Akm = {{0, 0, (1/3)*(Ea1 + Eb1 + Eb2)} , 
       {2, 0, (5/6)*((2)*(Ea1) + (-1)*(Eb1) + (-1)*(Eb2))} , 
       {2,-2, (5/2)*((1/(sqrt(6)))*(Eb1 + (-1)*(Eb2)))} , 
       {2, 2, (5/2)*((1/(sqrt(6)))*(Eb1 + (-1)*(Eb2)))} }