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Raman spectra of samples with differing vacancy values and nanocrystal sizes, including T2g, Eg, A1g, and rattling and T1u (inset) vibrations for (A) 34% B content with differing particle size, (B) 46% B content with differing particle size, (C) 7.4 nm particles with differing %B content, and (D) 6.2 nm particles with differing %B content.
