A Hexagonal (Wurtzite) Form of Silicon

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Science  24 Sep 1976:
Vol. 193, Issue 4259, pp. 1242-1243
DOI: 10.1126/science.193.4259.1242


The existence of a hexagonal (wurtzite) form of silicon, similar to that form of diamond (carbon) observed in meteorites and in the laboratory, has been identified by x-ray diffraction in reaction-bonded silicon nitride containing unreacted silicon. The presence of this phase is due to stresses created in the silicon by the nitridation reaction.