21. The average hardness of a material decreases with d ( crystallite size ) decreasing below 10 nm. 22. The Tomes'processes are angled, which introduces differences in crystallite orientation, and hence structure. 23. Some thermoplastics optical clarity is necessary, as light is scattered strongly by crystallites larger than its wavelength. 24. As enamel is secreted, some mineralisation occurs by Ca2 + deposition between nanospheres of amelogenins forming crystallites . 25. Polycrystalline and paracrystalline phases are composed of a number of smaller crystals or " crystallites ." 26. In common materials, crystallites are large enough that grain boundaries account for a small fraction of the material. 27. When the crystallites are mostly ordered with just some random spread of orientations, one has a mosaic crystal. 28. It crystallizes in the monoclinic system and usually forms massive aggregates of prismatic crystallites or in dull clay masses. 29. Tin anneals at reasonably-low temperature as well, normalizing tin's microstructure of crystallites / grains. 30. Currently, most studies follow Darwin in assuming a Gaussian distribution of crystallite orientations centered on some reference orientation.
