deltat12=om2-om1+2.0d0
cosphi=om12-om1*om2
eij=akcm*deltad*deltad+akth*(deltat1*deltat1+deltat2*deltat2)
- & +akct*deltad*deltat12
+ & +akct*deltad*deltat12+ebr
& +v1ss*cosphi+v2ss*cosphi*cosphi+v3ss*cosphi*cosphi*cosphi
+ & +ss_depth
c write(iout,*) i,j,"rij",rij,"d0cm",d0cm," akcm",akcm," akth",akth,
c & " akct",akct," deltad",deltad," deltat",deltat1,deltat2,
c & " deltat12",deltat12," eij",eij