Crystallite

Polycrystalline structures composed of crystallites. Clockwise from top left:
a) malleable iron
b) electrical steel without coating
c) solar cells made of multicrystalline silicon
d) galvanized surface of zinc
e) micrograph of acid etched metal highlighting grain boundaries

A crystallite is a small or even microscopic crystal which forms, for example, during the cooling of many materials. Crystallites are also referred to as grains.

Bacillite is a long thin needle-shaped a crystallite. It is rodlike with parallel longulites.

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