  Orientation determination does not necessarily require complete knowledge of
the local atomic arrangement in a material. We present a method for
microstructural phase discrimination and orientation analysis of phases for
which there is only limited information available. In this method, experimental
Kikuchi diffraction patterns are utilized to generate self-consistent standards
for use in the technique of Electron Backscatter Diffraction (EBSD). As an
application example, we map the locally varying orientations in samples of
icosahedral quasicrystals observed in a Ti40Zr40Ni20 alloy.
