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comparative more polycrystalline, superlative most polycrystalline
Composed of an aggregate of very small crystals in random orientations quotations examples
This was revealed only in the experiments of ion bombardment of single crystals, because a polycrystalline material, even though its microcrystallites have a regular structure, in fact behaves like a nonarranged, random system.
1966, Proceedings of the Seventh International Conference on Phenomena in .in Ionized Gases