ALKALINE EARTH METAL SILICATE FLUORESCET BODY AND LOW PRESSURE MERCURY DISCHARGE LAMP EQUIPPED WITH SAID SILICATE

摘要

A luminescent alkaline earth metal silicate activated by trivalent europium and trivalent terbium together with monovalent lithium as a charge compensator according to the formula: (Mg1-xCax)pSiO4:Eu @@ Tbz @3Liy+ @@ wherein 0/= x /= 0.9 0.001/= y /= 0.20 0.01/= z /= 0.32 1.9/= p+2y+2z/=2. A low pressure mercury vapour discharge lamp provided with such a luminescent silicate (15) is shown.