Using the χ2-test a statistical method is described, which allows a clear decision
whether a given distribution of orientation relationships between adjacent grains is
random or not. The validity of this method even for small numbers of orientation
relationships, as obtained from electron microscopical measurements, is shown by
generating a small sample of randomly distributed orientation relationships and
testing it against the calculated distribution. The method is applied to orientation
relationships measured between α/α-, α/β- and β/β-neighbouring grains in single- and
dual-phase brasses.