Synthesis, structure, and scintillation of Rb4Ta2Si8O23

A new tantalum silicate, Rb 4 Ta 2 Si 8 O 23 , was synthesized as high-quality single crystals by the high temperature flux growth method. found to exhibit intense blue luminescence and scintillation a self-activated luminescent silicate. crystallizes in triclinic space group P 1 ? with lattice parameters of = 6.8916(2) Å, b 7.7669(2) c 11.0018(3) ? 76.3110(10)°, ? 89.2560(10)°, ? 71.8090(10)°. The structure consists corner-sharing SiO tetrahedra forming infinite ribbons connected isolated TaO 6 octahedra. synthesis, structure, optical properties are reported, notably, bright when exposed X-rays. quantitatively evaluated radioluminescence (RL) measurements determined be ?47% BGO powder. • using crystal growth. solved X-ray diffraction. exhibits photoluminescence scintillation. Scintillation intensity 47% powder from RL measurements.