A crystal is a solid where the atoms form a periodic arrangement (quasicrystals are an exception, see below) Not all solids are crystals. Crystal, any solid material in which the component atoms are arranged in a definite pattern and whose surface regularity reflects its internal symmetry Crystals are classified in general categories, such as insulators, metals, semiconductors, and molecular solids. Crystals are nothing more than an ordered arrangement of molecules or atoms
Crystals come in many different shapes and sizes, and each one has different characteristics What they are made of determines how it will form. The meaning of crystal is quartz that is transparent or nearly so and that is either colorless or only slightly tinged How to use crystal in a sentence. For gemologists and mineralogists, the scientific definition of a crystal goes right to the atomic level A crystal is a solid whose atoms are arranged in a highly ordered repeating pattern.
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