Fe 3 C, VC, TaC, and TiC nanocrystals have been synthesized by subambient alkalide reduction. The initial products in all cases appear to be either amorphous or sub-nanocrystalline. Annealing between 950 and 1200 °C, depending on the compound, resulted in nanocrystalline materials. Surface areas, measured by the BET method, range between 66 and 164 m 2 /g and crystallite sizes between ∼2 and 25 nm.
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Nelson et al. (2002) studied this question.
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