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For EBSD ab-initio indexing, a new method that adopts several methodsoriginally invented for powder indexing, is reported. Distribution rules ofsystematic absence and error-stable Bravais lattice determination are used toeliminate negative influence of non-visible bands and erroneous informationfrom visible bands. In addition, generalized versions of the de Wolff figuresof merit are proposed as a new sorting criterion for the obtained unit-cellparameters, which can be used in both orientation determination and ab-initioindexing from Kikuchi patterns. Computational results show that the new figuresof merit work well, similarly to the original de Wolff $M_n$. Ambiguity ofindexing solutions is also pointed out, which happens in particular forlow-symmetric cells, and may generate multiple distinct solutions even if veryaccurate positions of band center lines and the projection center are given.

Distribution rules of systematic absence and generalized de Wolff figure of merit applied to EBSD ab-initio indexing