Crystal structure elucidation and luminescence properties of a blue-emitting BaMgSi3O8:Eu2+ phosphor with an alkali feldspar structure

Abstract

The luminescent phase of the blue-emitting phosphor BaMgSi₄O₁₀:Eu²⁺, the structure of which was previously reported to be a gillespite (BaFeSi₄O₁₀)-type structure, has been identified by detailed investigations through single-crystal X-ray diffraction (XRD) analysis, powder Rietveld analysis and luminescence measurements. The actual blue-emitting phase was newly found to be BaMgSi₃O₈:Eu²⁺, whose host lattice has a triclinic alkali feldspar-type structure.