The electronic structure of five antimony chalcogenides (SbI₃, Sb₂{Te}₃$, SbTeI, ${TlSbS}₂$, and ${Tl}₃SbS₃) is investigated. Tight-binding band-structure calculations and molecular models are combined with x-ray diffraction and photoemission spectroscopy to get a coherent picture of these materials. The same methods are used to discuss the chemical notion of the 5s² antimony lone-pair stereochemical activity and to explain the observed trends in the M\"ossbauer isomer shift.
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Lefebvre et al. (1988) studied this question.
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