Electron Paramagnetic Resonance of Mn$\text{}^{2+}$ in Tl$\text{}_{2}$Mg(SeO$\text{}_{4}$)$\text{}_{2}$·6H$\text{}_{2}$O Single Crystals

The electron paramagnetic resonance of Mn$\text{}^{2+}$ in Tl$\text{}_{2}$Mg(SeO$\text{}_{4}$)$\text{}_{2}$·6H$\text{}_{2}$O single crystals has been observed at 298 K and 77 K at ~9.45 GHz. Mn$\text{}^{2+}$ has been found to substitute for Mg$\text{}^{2+}$ exhibiting two magnetically inequivalent complexes. The electron paramagnetic resonance spectra have been analysed using the spin Hamiltonian appropriate for rhombic symmetry.