Crystalline urea inclusion complexes (UIC) formed with urea-d4 and hexadecane are used to orient the n-alkane relative to a neutron beam for inelastic neutron scattering studies. Deuteration of the host lattice makes it nearly transparent for neutron studies. Comparison of the results for UIC orientation parallel and perpendicular to the neutron beam permits separation of the low frequency vibrational spectrum into those vibrations that are parallel to the alkane long axis and those perpendicular to the long axis.