Metallothermic reduction as an electronically mediated reaction

@article{Okabe1998MetallothermicRA,
  title={Metallothermic reduction as an electronically mediated reaction},
  author={Toru H. Okabe and Donald R. Sadoway},
  journal={Journal of Materials Research},
  year={1998},
  volume={13},
  pages={3372-3377}
}
The commonly held view that metallothermic reduction is strictly a chemical reaction and that the process is rate limited by mass transfer has been found to be incomplete. In a study of the production of tantalum powder by the reaction of K 2 TaF 7 with sodium, it has been shown that there are two dominant kinetic pathways, both involving electron transfer. Furthermore, the overall rate of reaction is limited by electron transport between the reactants. This indicates that metallothermic… 
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