I-129 and Au-197 Mössbauer Spectroscopy of AuI and AgAuI2
2002 ◽
Vol 57
(6-7)
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pp. 575-580
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Keyword(s):
X Ray
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Mössbauer spectroscopy of 129I and 197Au nuclei has been applied for AuI and AgAuI2 to clarify the electronic structures of the gold and iodine atoms, and to investigate the nature of the Au-I bonds. In the 129I Mössbauer spectra the sign of e2qQ is positive for AuI, whereas the sign is negative for AgAuI2. This is attributable to the difference in molecular structures: The iodine atom in AuI is bridged by two gold atoms and in AgAuI2 the iodine is terminal. The 197Au Mössbauer spectra suggest that the Au-I bond in AgAuI2 is more covalent than that in AuI. We have revealed that AgAuI2 consists of Ag+ and linear [I-Au-I]- units from the Rietveld refinement of the X-ray powder diffraction pattern
2021 ◽
Vol 32
◽
pp. 1-13
2012 ◽
Vol 190
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pp. 455-458
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