  We have fabricated c-axis point contact junctions between high-quality LiFeAs
single crystals and Pb or Au tips in order to study the nature of the
superconducting order parameter of LiFeAs, one of the few stoichiometric
iron-based superconductors. The observation of the Josephson current in c-axis
junctions with a conventional s-wave superconductor as the counterelectrode
indicates that the pairing symmetry in LiFeAs is not pure d-wave or pure
spin-triplet p-wave. A superconducting gap is clearly observed in point contact
Andreev reflection measurements performed on both Pb/LiFeAs and Au/LiFeAs
junctions. The conductance spectra can be well described by the
Blonder-Tinkham-Klapwijk model with a lifetime broadening term, resulting in a
gap value of \approx 1.6 meV (2{\Delta}/kBTC \approx 2.2).
