Vitreous phase coating on glaserite-type alkaline earth silicate blue phosphor BaCa2MgSi2O8:Eu2+

X-ray diffraction, 31P NMR and europium photoluminescence properties of the Na2Ba1−xSrxMg(PO4)2 system related to the glaserite type structure

“…In 1967, Fuchs et al, described the structure of Na 2 CaMg(PO 4 ) 2 and Na 2 SrMg(PO 4 ) 2 as a distorted glaserite [6,7]. Later, similar descriptions were published on counterpart silicates Ca 3 Mg(SiO 4 ) 2 [8] and BaCa 2 Mg(SiO 4 ) 2 [9].…”