We　found　that　tetragonal　Gd0.5Lu0.5VO4-known　as　host-crystal　for　Ln(3+)-lasants-is　an　attractive　optical　material　for　Raman　laser　converters.　We　discovered　and　investigated　its　almost　sesqui-octave　Stokes　and　anti-Stokes　lasing　comb　resulting　from　four　SRS-promoting　vibration　modes　in　combination　with　cascaded　and　cross-cascaded　many-phonon　chi((3))-nonlinear　interactions.　Furthermore,　estimations　of　the　steady-state　Raman　gain　coefficient　have　been　performed.