Spectra and Energy Levels of Rare Earth Ions in Crystals

Introduction -- Historical -- The Rare Earths -- Crystals Available For Study : Crystals With Water Of Crystallization ; Anhydrous Crystals ; Crystals With Replacement Of Divalent Ions -- Experimental Procedure -- Spectra And Levels Of The Free Ions -- The Crystal Field -- Crystal Symmetry And Structure Of The Spectrum -- Intensities, Selection, And Polarization Rules -- Comparison With Empirical Data -- Zeeman Effect And Magnetic Properties -- Divalent Rare Earth Ions In Crystals -- Review Of The Empirical Data -- Line Structure. Edited By H. M. Crosswhite And Hannah Crosswhite. Bibliography: P. 352-385.