Luminescence properties of Mg4Ta2O9:M (M= Hf4+, Zr4+, W6+, Mo6+) with vacuum ultraviolet light and X-ray excitation

Broadband short-wave infrared Mg4Nb2O9:Cr3+,Li+ phosphor for nondestructive safety detection and biomedical imaging

“…, a = 5.1611 Å versus a = 5.1624 Å, and c = 14.0435 Å versus c = 14.0240 Å. 41,42 Into a six-coordinated environment, the effective ionic radium ( r eff ) of Ta 5+ is equal to that of Nb 5+ , approximately r eff = 0.64 Å. 43 These practically make a perfect solid solution material, Mg 4 Nb x Ta 2− x O 9 :3%Cr 3+ ( x = 0, 0.5, 1, 1.5, 2), to continuously change the Nb 5+ concentration from a regime where it serves as a dopant to a regime as the main constituent.…”