Abstract
The preparation of phosphors with a matrix of magnesium, silicon, oxygen, and fluorine, and activated by titanium or titanium and manganese is described. X‐ray data are given. The materials when excited by mercury resonance radiation have wide emission bands with a high proportion in the long wave‐length region of the spectrum. They are useful fluorescent lamp phosphors. The mechanism of luminescence appears to be sensitization by titanium, although there are unusual features in the case.
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