Abstract
M\"ossbauer absorption spectra in Ge${\mathrm{Fe}}_{2}$${\mathrm{O}}_{4}$ were measured, covering a temperature range from 77 to 1020\ifmmode^\circ\else\textdegree\fi{}K. From a first-order perturbation calculation, the orbital eigenfunctions, as well as the quadrupole splitting as a function of temperature, were determined with the trigonal field splitting $\ensuremath{\delta}$ as a parameter. By fitting the theoretical expression for the temperature dependence of the quadrupole splitting to the experimental results, $\ensuremath{\delta}$ was found to be (1650\ifmmode\pm\else\textpm\fi{}50)\ifmmode^\circ\else\textdegree\fi{}K.
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