Synthesis and luminescence properties of the lithium-containing lanthanum-oxycarbonate-like borates
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The lithium-containing lanthanum-oxycarbonate-like borate, Li0.6La2O2.25(BO3)(0.7), has been synthesized by solid-state reactions and was found to be isostructural with the type II lanthanum-oxycarbonate La2O2(CO3). The new compound, lithium-containing lanthanum-oxycarbonate-like borate Li0.6La2O2.25(BO3)(0.7) has been synthesized and its structure characterized by the Rietveld method using powder X-ray diffraction data. It crystallizes in space group P6(3)/mmc with lattice parameters of a=b=4.03396(3) angstrom, c=16.5863(2) angstrom, V=233.746(4) angstrom(3). The mechanism of the lithium incorporation in the borate is that four Li+ cations replace one (B2O)(4+) group. i.e. Li0.6La2O2.25(BO3)(0.7) can be described as Li2xLa2O1.5+2.5x(BO3)(1-x), x=0.3 and the lithium incorporation stabilized the type II borate. The luminescent properties of Li0.6La2O2.25(BO3)(0.7) doped with Eu3+ were studied, indicating a potential application in white light emitting diodes (WLEDs). (C) 2012 Elsevier Inc. All rights reserved.
CitationJOURNAL OF SOLID STATE CHEMISTRY,2012（194）：225-232