Abstract

Abstract Absorption and emission spectra of beryls doped with a mixture of less than 0.1% V2+ and V3+ have been measured. The resulting crystal field parameters are: V2+: Dq= 1500 cm-1 , B = 750 cm-1 , C = 3250 cm-1; V3+: Dq= 1750 cm-1 , B = 580 cm-1 C = 2480 cm-1. Within the frequency range of our spectrometers the V3+ is dominating in absorption while V2+ produces the observed emission spectrum by superposition of the 4T2-4A2 fluorescence and 2E, 2T -4A2 phosphorescence bands. We were not able to observe emission of V3+

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