It was found that the branching of coincidence boundaries, AB, BC and CA, at a triple junction of a cubic polycrystal, could be described by:

CA = ABBC/d2

where d was a common divisor of AB and BC. By using this rule, polycrystal models which were composed of coincidence boundaries with finite -values could be easily constructed.

K.Miyazawa, K.Ito, Y.Ishida: Materials Science Forum, 1996, 207-209, 301-4