The four types of crystals are ionic crystals, metallic crystals, covalent crystals, and molecular crystals.
Crystal, any solid material in which the component atoms are arranged in a definite pattern and whose surface regularity reflects its internal symmetry.
An ionic crystal is a crystalline ionic compound. They are solids consisting of ions bound together by their electrostatic attraction into a regular lattice.
A crystalline solid in which the atoms are held together by metallic bonds. Metallic crystals are found in some interstitial compounds as well as in metals and alloys.
Covalent Crystals also called atomic crystals are the molecular solids in which the same or different atoms are joined together by covalent bonding.
Molecular crystals are substances that have relatively weak intermolecular binding, such as dry ice.
Thus, there are four types of crystals such as ionic crystals, metallic crystals, covalent crystals, and molecular crystals.
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