Covalent Bonding and the Neutron Magnetic Form Factor of theMn2+Ion

Abstract

Fully variational unrestricted Hartree-Fock calculations for the ${\left(\mathrm{M}\mathrm{n}{\mathrm{F}}_6\right)}^{4-}$ cluster are reported. Charge and spin densities are analyzed and shown to result in a neutron magnetic form factor which is contracted relative to the free-ion value in agreement with experiment but contrary to predictions of simple covalent-bonding theory.