Figure 1.

XRD pattern of Y1.97Yb0.02Er0.01O3 UCNPs. Diffraction peaks are indexed according to PDF card #87-2368 (cubic bixbyite Y2O3 crystal structure).

Lojpur et al. Nanoscale Research Letters 2013 8:131   doi:10.1186/1556-276X-8-131
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