Mössbauer and specific heat studies of the vibrations of metal core atoms in polynuclear gold cluster compounds

197Au Mössbauer effect spectroscopy and specific heat measurements have been performed as a function of temperature on the three gold polynuclear cluster compounds [Au 9[PPh 3) 8](NO 3) 3, Au 11(PPh 3) 7(SCN) 3, and Au 55(PPh 3) 12Cl 6. The Mössbauer data yield information on the vibrational motions...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 1988-10, Vol.153 (1), p.33-52
Main Authors: Smit, H.H.A., Nugteren, P.R., Thiel, R.C., de Jongh, L.J.
Format: Article
Language:English
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Summary:197Au Mössbauer effect spectroscopy and specific heat measurements have been performed as a function of temperature on the three gold polynuclear cluster compounds [Au 9[PPh 3) 8](NO 3) 3, Au 11(PPh 3) 7(SCN) 3, and Au 55(PPh 3) 12Cl 6. The Mössbauer data yield information on the vibrational motions of the various distinguishable Au sites, as well as on the motion of the clusters as a whole. The Mössbauer and the specific heat data are successfully described by a superposition of inter- and intra-cluster vibrations. The latter are determined by calculating numerically the normal modes of vibration of the metal cores.
ISSN:0921-4526
DOI:10.1016/0921-4526(88)90032-4