Published in Journal de Physique, Volume 32, Issue C1, March 1, 1971, pages 941-942.
NOTE: At the time of publication, the author Richard B. Frankel was not yet affiliated with Cal Poly.
The definitive version is available at https://doi.org/10.1051/jphyscol:19711337.
An iron-doped KMgF3 single crystal has been studied with the Mössbauer technique. The two charge states, Fe2+ and Fe3+, are observed. Below 12 °K an Fe2+ quadrupole doublet appears. Using Ham strain model we calculate that the first excited spin-orbit level lies ~ 120 cm-1 above the Γ5g ground state.
1971 EDP Sciences.