An electron paramagnetic resonance study of Mn2+doped in Cd(ClO4)2sdot;6H2O has been made from 328 K to liquid nitrogen temperature. The site symmetry of Cd2+is trigonal with a water octahedron distorted parallel to the crystallographic c axis. Mn2+substitutes for Cd2+and exhibits a characteristic 30hyphen;line hyperfine spectrum at room temperature (298 K) for the magnetic fieldHalong the c axis. TheDparameter is small and therefore there is considerable overlapping of lines in the spectrum. The spectrum is axially symmetric. On lowering the temperature, phase transitions are found to occur at 272plusmn;1 and 115.5plusmn;1 K.
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