Optical and Magnetic Properties of Some Transition Metal Ions in Barium Phosphate Glass

In barium phosphate glass containing first‐row transition metal ions, the ions appear to possess normal oxidation states: Cr 3+ , Mn 3+ , Fe 2+,3+ , Co 2+ , Ni 2+ , and Cu 2+ . Room temperature and 77°K spectra for Cr 3+ ‐, Mn 3+ ‐, Fe 2+,3+ ‐, Ni 2+ ‐, and Cu 2+ ‐containing glasses can be interpreted, on the, basis of octahedrally coordinated metal ions, whereas the spectrum of the Co 2+ glass correlates with a tetrahedrally coordinated metal ion. Magnetic moments for the glasses are similar to those for the spin‐only values of the various metal ions.