The cation distribution of the Y2.4In0.6Fe5O12 system has been studied by means of Mössbauer spectroscopy and x-ray diffractometry. The structure of the system is yttrium-iron-garnet structure with a lattice constant of 12.387 Å. Four Zeeman lines from Fe3+ ions at the a,a′ and d,d′ sites have been observed at room temperature. Using the temperature dependence of the absorption area of Mössbauer line and the results of x-ray diffractometry, the cation distribution of the system can be written as {Y2.4In0.6Feα−β}(Fe2−α) [Fe3+β]O12.
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