A new rare-earth phosphate compound Cs4PbTb2(PO3)12: Crystal structure and multicolor emitting properties introduced by Eu3+ doping

Recent progress in trivalent europium (Eu3+)-based inorganic phosphors for solid-state lighting: an overview

“…The 3D open framework is formed by P 4 O 12 cyclo-tetraphosphate and (Pb|Tb)O 8 polyhedra, filling with large Cs + ions. 185 Each asymmetry unit contains a unique Cs atom at the 16c site, a unique (Pb|Tb)1 mixed occupied atom at the 12b site, a unique P atom at the 12b site, and three O atoms at the general sites. Each P atom is tetra-coordinated by O atoms into a PO 4 tetrahedron, and four PO 4 groups join together via corner-sharing O atoms to form a P 4 O 12 four-membered ring unit.…”