No abstract

No abstract

No abstract

No abstract

No abstract

No abstract

This study reports the four-dimensional commensurately modulated structure of ZnNb2O6 using superspace formalism for aperiodic structures considering the modulation vector, q = 1/3 b*.

Sodium samarium borate Na 3 Sm(BO 3 ) 2 , was prepared by a flux method and structurally characterized by single-crystal structure analysis for the first time. The results show that it crystallizes in the monoclinic system P2 1 /n, with a = 6.5667(3) Å, b = 8.7675(4) Å, c = 10.1850(5), β = 90.86 • , V = 586.32(5) Å 3 and Z = 4. The structure contains NaO 7 , NaO 6 , NaO 5 , SmO 8 , and BO 3 units, which are interconnected via corner-or edge-sharing O atoms into a three-dimensional structure. The excitation spectra, emission spectra, decay time, and Commission International de l'Éclairage (CIE) chromaticity index of Na 3 Sm(BO 3 ) 2 were studied. Under near light excitation (406 nm), the powdered Na 3 Sm(BO 3 ) 2 shows the orange-red emission, which originates from the 4 G 5/2 → 6 H 9/2 and 4 G 5/2 → 6 H 7/2 transformation of Sm 3+ ion.