Viana R.R.; da Costa G.M.; De Grave E.; Jordt-Evangelista H.; Stern W.B.(2002)
The Mossbauer spectra of several blue beryls have been obtained in the temperature range of 4.2-500 K. A common feature observed in all room-temperature spectra is the presence of an asymmetric Fe2+ublet (ΔEQ5> ~ 2.7 mm ...