Decomposition of Molybdenum Hexacarbonyl

THE publication of results by Clougherty 1 and by Kaye 2 of the preparation of face-centred cubic molybdenum monocarbide, and by Goldschmidt 3 of the preparation of face-centred cubic ditungsten carbide, have led us to re-examine the face-centred cubic dimolybdenum carbide reported by Lander and Ger...

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Bibliographic Details
Published in:Nature (London) 1964-06, Vol.202 (4939), p.1327-1328
Main Authors: FERGUSON, I. F, AINSCOUGH, J. B, MORSE, D, MILLER, A. W
Format: Article
Language:English
Subjects:
Humanities and Social Sciences
letter
multidisciplinary
Science
Science (multidisciplinary)
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Summary:THE publication of results by Clougherty 1 and by Kaye 2 of the preparation of face-centred cubic molybdenum monocarbide, and by Goldschmidt 3 of the preparation of face-centred cubic ditungsten carbide, have led us to re-examine the face-centred cubic dimolybdenum carbide reported by Lander and Germer 4 . They observed its formation while trying to plate metallic substrates maintained at 300° to 475° C with molybdenum, formed by the pyrolysis of molybdenum hexacarbonyl in the presence of partial pressures of carbon monoxide ranging from 0.02 to 0.22 torr. The deposit had a face-centred cubic structure with a cell edge of 4.14 Å and was believed to be Mo 2 C, although full chemical analyses were not reported. They suggested it was isostructural with the Mo 2 N phase reported by Hägg 5 , which is believed to have a rock salt structure with a defective anion sublattice. A phase, identified as face-centred cubic Mo 2 C, has been noted by Kuo 6 as a precipitate in high-speed steels, although no lattice parameter was reported.
ISSN:0028-0836
1476-4687
DOI:10.1038/2021327b0