Fig. 1. (Color online) Schematic diagram of Si allotrope. (a) Si-I. (b) Si-IV. (c)Si-XII. (d) Si-XIII. (e) lonsdaleite Si structure. (f) Raman normal modes of hexagonal Si.

New Phys.: Sae Mulli 2021;71:827~837 https://doi.org/10.3938/NPSM.71.827

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