Electric dipole moment and polarizability of ScF

We have obtained accurate values for the electric dipole moment and static dipole polarizability of ScF In the ground vibrational state the dipole mom ent is mu = - 0.592 ea(0), the mean and the anisotropy of the dipole polari zability <(<alpha>)over bar> = 102.02 and Delta alpha = - 21.42 e(2)a(0)(2) E(h)(-1). The electric properties vary as mu (R)/ea(0) = - 0.590 - 1.139(R - R-e) - 0.058(R - R-e)(2) -0.056(R - R-e)(3) + 0.051(R - R-e)(4) <(<alpha>)over bar>(R)/e(2) a(0)(2)E(h)(-1) = 102.03 - 10.19(R - R-e) + 8.2 5(R - R-e)(2) -3.42(R - R-e)(3) + 1.85(R - R-e)(4) Delta alpha (R)/e(2)a(0)(2)E(h)(-1) = - 21.47 + 18.07(R - R-e) - 5.02(R - R -e)(2) +3.77(R - R-e)(3) - 1.50(R - R-e)(4) around the experimental bond length of R-e = 1.787 Angstrom. ScF is signifi cantly more polarizable than the isoelectronic polar diatomic molecules AlC l and SiS.