Single crystal EPR study of Mn(II) doped MgRb2(SO4)2.6H2O: A case of interstitial site by B. Sankar, B. Natarajan, S. Mithira, H. Anandhalakshmi, and P. Sambasiva Rao

Crystal Research and Technology

Cryst. Res. Technol. 42, 173 (2007) - Abstract -

Single crystal EPR study of Mn(II) doped MgRb₂(SO₄)₂.6H₂O: A case of interstitial site

B. Sankar, B. Natarajan*, S. Mithira*, H. Anandhalakshmi, and P. Sambasiva Rao*

Department of Chemistry, Annamalai university, Annamalai Nagar – 608 002, India
*Department of Chemistry, Pondicherry University, Pondicherry – 605 014, India

Keywords	single crystal EPR, Mn(II), magnesium rubidium sulphate hexahydrate, interstitial, covalency
PACS	61.72.Hh, 71.20.Be, 76.30.-v, 76.30.Fc
DOI	10.1002/crat.200610792

Single crystal electron paramagnetic resonance studies on magnesium rubidium sulphate hexahydrate doped with Mn(II) impurity, in the form of 0.1% of manganous chloride, are carried out at room temperature. The angular variation spectra of the crystal in the three orthogonal planes show that the paramagnetic impurity Mn(II) has entered the host lattice interstitially. The spin Hamiltonian parameters calculated are: g_xx = 1.974, g_yy = 1.928, g_zz = 1.980; A_xx = 9.28, A_yy = 8.58, A_zz = 9.87 mT and D_xx = -18.71, D_yy = -5.59, D_zz = 24.30 mT. The room temperature and liquid nitrogen temperature study for polycrystalline sample indicate no phase transition. The percentage covalency of Mn–O bond has been estimated to be 11.

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