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. 2017 Apr 27;7:46431. doi: 10.1038/srep46431

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Raman Shift spectra of the previously proposed black α-P (a), θ-P (b) and η-P, as well as the new G1 (d), G2 (e), G3 (f), B1 (g) and B2 (h). The peak height is in the logarithmic scale and it is smeared by Lorentzian function with a 2 cm⁻¹ width.