Flux synthesis of a new uranyl silicate K6 (UO2)3Si8O22

A new uranyl silicate,K6(UO2)3Si8O22,was synthesized by a flux method and characterized by single-crystal X-ray diffraction,solid-state NMR,and photoluminescence spectroscopy.The 3D framework structure contains UO6 tetragonal bipyramids and a new type of(Si8O22)12-unit.K6(UO2)3Si8O22,C2/m(No.12),a=1.24092(9) nm,b=1.45678(8) nm,c=0.81199(5) nm,β = 103.992(4)°,V=1.4240(1) nm3,Z=2,R1=0.0329 and wR2=0.0796.