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Figure 10
Raman spectra of the pristine Ln4(Al2O7□)O2 and Ln4(Al2O6F2)O2 samples. Bottom to top: Ln = Sm, Eu, Gd.

IUCrJ
Volume 6| Part 1| January 2019| Pages 128-135
ISSN: 2052-2525
https://doi.org/10.1107/S205225251801744X