The quon algebra, which interpolates between the Bose and Fermi algebras an
d depends on a free parameter q, is used to generate a Marumori mapping of
the quadrupole-quadrupole Hamiltonian, for a single j-shell. This Hamiltoni
an is then diagonatized for a system composed of six fermions and its eigen
values are compared with the ones obtained from the counterpart fermionic H
amiltonian and with another usual boson expansion method. The deformed mapp
ing is shown to require a larger basis than the usual Marumori method for t
he diagonalization of the Hamiltonian. The low-lying levels of the spectrum
obtained from the fermionic calculation in the SD subspace can be reproduc
ed with our mapping for some selected j-shells.