We have measured atomic resolution scanning tunnelling microscopy imag
es of V2O5. The layered compound V2O5 is a strongly anisotropic materi
al with the layers parallel to the (ab) plane. Although V2O5 is a semi
conductor with an optical gap of 2.3 eV an impurity band allows STM me
asurements with a good signal to noise ratio. Here we present atomic s
cale images of the V2O5 surfaces. The images show the periodicity of t
he bulk unit cell, but we observe various surface modifications, which
transform into each other during scanning of the surface.