Abstract
Monoclinic (P21/n) structure of B-site ordered double perovskites Ba2R2/3TeO6(R = Y, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) is elucidated from XRD, Raman and IR spectroscopy. The maximum relative temperature sensitivity of Ba2Y2/3TeO6:Eu3+between 300–500 K is 0.18% K−1.
Highlights
Among the different structural families of ceramic compounds, perovskites (ABX3) form the most often encountered materials since they are well known for their technological applications owing to their physical and chemical properties.[1]
The perovskite family can be extended by substituting cations at either A- or B-sites to form complex perovskites or double perovskites with the general formulae A2BB0X6, AA0BB0X6 and AA0B2X6, where the anion site is usually occupied by oxygen.[1,2,3,4]
The tolerance factor is determined by considering the effective size of vacancies the same as that of the B-site cations (R3+) and varies from 0.9904 to 1.0085 when the B-site is substituted with Gd3+ to Lu3+
Summary
Among the different structural families of ceramic compounds, perovskites (ABX3) form the most often encountered materials since they are well known for their technological applications owing to their physical and chemical properties.[1].
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