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Synthesis of New Isostructural Orthoborates NaBaR(BO 3 ) 2 with R = Tb

Abstract : Six new rare-earth orthoborates NaBaR(BO 3) 2 , with R = Tb, Dy, Ho, Er, Tm, Lu were synthesized using a multiple-step solid-state reaction. These new orthoborates continue the previously described isostructural lines of three-cation orthoborates NaBaR(BO 3) 2 , by R = Sc, Y, Yb. The structure of synthesized solid compounds is isotypic with the mineral eitelite, Na2Mg(CO 3) 2 , crystallizing in the trigonal system with space group R3̅. All prepared borates are isostructural, as evidenced by the presence of the same vibration modes in Raman spectra and of the same diffraction peaks in X-ray patterns. The photoluminescence of NaBaTb(BO 3) 2 have been investigated in a detail.
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Nadezhda Kononova, Vyacheslav Shevchenko, Alexander Kokh, Tatiana Nabeeva, David Chapron, et al.. Synthesis of New Isostructural Orthoborates NaBaR(BO 3 ) 2 with R = Tb. Materials Research, Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol), 2016, pp.834-838. ⟨10.1590/1980-5373-MR-2016-0081⟩. ⟨hal-01532748⟩



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