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Describe, with examples, the difference between amorphous structures and crystalline structures. - Leaving Cert Engineering - Question (b) - 2022
Question (b)
Describe, with examples, the difference between amorphous structures and crystalline structures.
Worked Solution & Example Answer:Describe, with examples, the difference between amorphous structures and crystalline structures. - Leaving Cert Engineering - Question (b) - 2022
Step 1
Describe Amorphous Structures
Answer
Amorphous structures are characterized by their irregular and non-geometric arrangement of atoms. Unlike crystalline solids, they do not have a long-range order, leading to a lack of a definite melting point. An example of an amorphous structure is acrylic, which is commonly used in various applications, including as a glass substitute, due to its versatility and transparency.
Step 2
Describe Crystalline Structures
Answer
Crystalline structures have a well-ordered and repeating arrangement of atoms, forming a definite geometric pattern. This regularity results in distinct melting points and often leads to superior mechanical properties. Examples include body-centered cubic (BCC), face-centered cubic (FCC), and hexagonal close-packed (HCP) structures, which are common in metals and minerals.