Wilbert Smith Archives Files Box 1131 17 1131-17-p035

Document Text (OCR)

NATURE ould sh romarkable foature, nan £ narrow bands correspondin, 3d(¢q)-orbitals*. Furthermo: tho ¢,-lovel is just about to fill up, wo sl the narrow band to lie at the absorption odgo. iron, on the othor hand, two electrons are already in the ¢,-orbitals so that a third would be forced to go in with antiparallel spin. It follows that the most stable empty orbitals aro bonding orbitals, so that tho narrow absorption band should be preceded by some absorption involving transitions to the...