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7 Difference between crystalline solids and amorphous solids

April 15, 2023
written by Adeel abbas

There are many key differences between crystalline solids and amorphous solids. Here are seven key differences between crystalline and amorphous solids:

image showing the crystalline solid vs amorphous solid

Table of Crystalline solids vs Amorphous solids

Crystalline SolidsAmorphous Solids
Well-defined, ordered atomic or molecular structureProperties are more variable and depend on factors such as temperature, pressure, and composition
Sharp melting pointBroader melting range and gradually soften as they are heated
Unique physical and chemical properties determined by their structureProperties more variable and depend on factors such as temperature, pressure, and composition
Manufactured with well-defined structures through processes such as crystallization or solidification from a meltProduced by rapidly cooling a molten material, resulting in a disordered structure
Often have unique optical properties, such as birefringenceTypically do not exhibit such optical effects
Typically harder and more brittle due to their ordered structureGenerally more flexible and resistant to breaking
Often exhibit predictable expansion and contraction in response to changes in temperatureCan show more variable and complex responses to temperature changes

Structure: Crystalline solids have a well-defined, ordered atomic or molecular structure, whereas amorphous solids lack long-range order and have a disordered structure.

Melting Point: Crystalline solids have a sharp melting point, meaning they transition from solid to liquid at a specific temperature, whereas amorphous solids have a broader melting range and gradually soften as they are heated.

Properties: Crystalline solids have unique physical and chemical properties that are determined by their structure, such as high melting and boiling points, unique shapes and angles, and anisotropic properties. On the other hand, amorphous solids have more variable properties and depend on factors such as temperature, pressure, and composition.

Manufacturing: Crystalline solids can be manufactured with well-defined structures through crystallization or solidification from a melt. Amorphous solids, however, are typically produced by rapidly cooling a molten material, which results in a disordered structure.

Optical Properties: Crystalline solids often have unique optical properties, such as birefringence, which causes light to split into two beams with different polarizations. Amorphous solids typically do not exhibit such optical effects.

Mechanical Properties: Crystalline solids are typically harder and more brittle than amorphous solids due to their ordered structure. Amorphous solids, on the other hand, are generally more flexible and resistant to breaking.

Thermal Expansion: Crystalline solids often exhibit a predictable expansion and contraction in response to changes in temperature, whereas amorphous solids can show more variable and complex responses to temperature changes.