The Mössbauer effect in tin(II) compounds. Part IX. The sign of the quadrupole coupling constants in a number of tin(II) materials

Abstract

The signs of the quadrupole coupling constants, eV_zzQ, in the compounds NaSnF₃, NaSn₂F₅, SnSO₄, Sn(HCO₂)₂, Sn(AcO)₂, and K₂Sn(C₂O₄)₂,H₂O are all shown to be positive. This is discussed in terms of the interpretation of the quadrupole splitting data for these materials. Both covalent and point-charge arguments predict a negative value for eQ but neither approach can predict the magnitude of the quadrupole splitting in tin(II) materials.