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Fig. 5. (a) Upconversion luminescence spectra versus temperature in LZMO:0.02Er3+/0.5Yb3+ phosphor. (b) Relationship between integral upconversion emission intensities and temperature. (c) XRD images of LZMO:0.02Er3+/0.5Yb3+ at different temperature. (d) Weight loss curve of LZMO:0.02Er3+/0.5Yb3+ phosphor.