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Figure 3
Micrographs of Sm4(Al2O6F2)O2, Eu4(Al2O6F2)O2 and Gd4(Al2O6F2)O2 phases prepared using a low-temperature fluorination route.

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