Narrow-band red emitting oxonitridosilicate phosphor LaSrSiNO:Pr (x≈ 1.69).

The new oxonitridosilicates LnSrSiNO (Ln = La, Ce) were synthesized by high temperature solid-state reactions. The crystal structures were solved and refined from both single-crystal and powder X-ray diffraction data. These oxonitridosilicate compounds crystallize in the monoclinic space group P2/n (no.