EPR Investigation Of Mn (II) Probe In Diaquamalonatozinc(II) Single Crystals - Usage In Enrichment Of Dental Cement

Abstract

Single crystal EPR studies on Cu(II) and VO(II) doped Diaquamalonatozinc(II) are already studied and published. Inorder to understand the effect of Mn(II) in the host lattice Diaquamalonatozinc(II), single crstal EPR studies of Mn(II) doped Diaquamalonatozinc(II) are carried out at room temperature to identify the local structure of the host ion. Angular variation of Mn(II) hyperfine lines in the three orthogonal planes shows the presence of a two sites. The spin-Hamiltonian parameters calculated from the single crystal EPR spectra are: gxx = 1.989, gyy = 1.999, gzz = 2.023; Axx = 8.72, Ayy = 9.28; Azz = 9.34 mT, Dxx =-33.36, Dyy =-7.25, Dzz = 40.61 mT and E = 13.05 mT. The spin-Hamiltonian parameters calculated from the powder EPR spectrum are: g = 1.995, A = 9.25 mT, D =-53.6. The percentage of covalency obtained is around 8.5%.