A new method for determining signs of Mössbauer quadrupole splittings: relative signs of 119Sn and 57Fe quadrupole splittings in {Fe(SnCl3)[P(OMe)3]5}+BPh4–

Abstract

The observed intensity asymmetries in the ⁵⁷Fe and ¹¹⁹Sn spectra of {Fe(SnCl₃)[P(OMe)₃]₅}⁺BPh₄^– show that the signs of the ¹¹⁹Sn and ⁵⁷Fe quadrupole splittings are the same; since the sign of (½e²qQ)¹¹⁹Sn is certainly positive, (½e²qQ)⁵⁷Fe is also positive; the application of this method for determining signs of quadrupole splittings for such nuclei as ¹⁹⁷Au, ⁹⁹Ru, and ¹⁹³Ir is discussed.