Nepheline Na,K AlSi

Time resolved luminescence spectra under excitation by 266 nm are characterized by the band peaking at 695 nm with decay time of 100 ps (Fig. 4.148). Principally it may be connected to Fe or Cr centers. 

Excitation by CW laser with 514 nm revealed luminescence bands peaking at 752 and 710 nm (Fig. 4.149). Under 532 and 780 nm cw excitations another two bands were found peaking at 768 and 950 nm, correspondingly (http //rruff.info). 

Steady state luminescence of phlogopite was connected to Mn substituting for Mg and Mn at unknown site (Gorobets and Rogojine 2001). Excitation by CW laser with 532 nm revealed luminescence band peaking at 765 nm evidently belonging to Fe center and lines at 661 and 663 nm which may be ascribed to Cr - (Fig. 4.150). 

---