The complex permittivity of ethylammonium nitrate has been measured as a fu
nction of frequency between 3 MHz and 40 GHz at eight temperatures between
288.15 and 353.15 K. The spectra are well represented by a sum of a conduct
ivity term and a relaxation spectral function that reflects an unsymmetrica
l relaxation time distribution. Parameter values are given for the Cole-Dav
idson term and the Kohlrausch-Williams-Watts model. Molecular mechanisms in
conformance with an unsymmetrical relaxation time distribution are discuss
ed. The dominant relaxation process with a relaxation frequency in the acce
ssible range can be explained by the formation of a small amount of dipolar
ion complexes. The values for the extrapolated high-frequency permittivity
indicate a further relaxation process, well above the frequency range of m
easurements, which is likely to reflect modes of motions of the cation and
anion lattices relative to one another.