Chemistry / Chem 1451 · Atom · ~20 seconds
Crystalline vs. Amorphous Solids
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A crystalline solid has particles arranged in a definite, repeating pattern; an amorphous solid's particles are frozen randomly instead.
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Quartz forms ordered crystalline structure, while rapidly cooled molten silica of the same composition forms amorphous glass.
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Crystalline and amorphous forms can share an identical formula — the distinction is arrangement, not composition.