Abstract
THREE forms of molybdenum monocarbide (MoC) having a hexagonal unit cell have been reported in the literature1. In a recent note, Clougherty, Lottrop and Kafalas2 have described a high-pressure synthesis of a new face-centred cubic molybdenum carbide, which they designate α-MoC. This material was prepared by heating an equiatomic mixture of molybdenum and carbon or dimolybdenum carbide and carbon at temperatures between 1,800° C and 2,500° C under pressures ranging from 40–70 kb. The reported lattice constant was 4.27 Å.
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References
Pearson, W. B., A Handbook of Lattice Spacings and the Structure of Metals and Alloys (Pergamon Press, London, 1954).
Clougherty, E. V., Lothrop, K. H., and Kafalas, J. A., Nature, 191, 1194 (1961).
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KAYE, G. Face-centred Cubic Molybdenum Monocarbide. Nature 195, 1195–1196 (1962). https://doi.org/10.1038/1951195a0
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DOI: https://doi.org/10.1038/1951195a0
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