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MTL 200 Questions and Correct Answers/
Latest Update / Already Graded
What are ceramics?
Ans: Ceramics are elements composed of at least two
elements, often more, with complex crystal structures that
range from purely ionic to totally covalent.
Anisotropy
Ans: directionality of properties
What influences the crystal structure of ceramics?
Ans: The electrical charge of ions and the relative sizes of the
anion and cation.
Why must a ceramic molecule be neutral?
Ans: The net charge across the cation and anion must be 0, and
the whole ceramic molecule must be neutral.
What do cations and anions prefer in terms of nearest neighbors?
Ans: Cations prefer to have as many nearest neighbor anions as
possible, and anions prefer to have as many cations as possible.
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What are the most common coordination numbers in ceramics?
Ans: The most common coordination numbers in ceramics are
4, 6, and 8
What happens when the ratio of the radii is greater than 1?
Ans: The coordination number is 12.
What are the 3 types of ceramic crystal structures?
Ans: AX, AmXp, and AmBnXp Type
What are the 3 subdivisions of AX- Type ceramic structure?
Ans: 1. Rock salt structure (NaCl) 2. Cesium Chloride Structure
(CsCl)
3. Zinc Blende Structutre (ZnS)
What is the main relationship between the unit cell and rock salt
structure (NaCl) and its coordination number?
Ans: The main relationship is 2(r_c + r_a) = a
All rights reserved © 2025/ 2026 |
MTL 200 Questions and Correct Answers/
Latest Update / Already Graded
What are ceramics?
Ans: Ceramics are elements composed of at least two
elements, often more, with complex crystal structures that
range from purely ionic to totally covalent.
Anisotropy
Ans: directionality of properties
What influences the crystal structure of ceramics?
Ans: The electrical charge of ions and the relative sizes of the
anion and cation.
Why must a ceramic molecule be neutral?
Ans: The net charge across the cation and anion must be 0, and
the whole ceramic molecule must be neutral.
What do cations and anions prefer in terms of nearest neighbors?
Ans: Cations prefer to have as many nearest neighbor anions as
possible, and anions prefer to have as many cations as possible.
All rights reserved © 2025/ 2026 |
, Page |2
What are the most common coordination numbers in ceramics?
Ans: The most common coordination numbers in ceramics are
4, 6, and 8
What happens when the ratio of the radii is greater than 1?
Ans: The coordination number is 12.
What are the 3 types of ceramic crystal structures?
Ans: AX, AmXp, and AmBnXp Type
What are the 3 subdivisions of AX- Type ceramic structure?
Ans: 1. Rock salt structure (NaCl) 2. Cesium Chloride Structure
(CsCl)
3. Zinc Blende Structutre (ZnS)
What is the main relationship between the unit cell and rock salt
structure (NaCl) and its coordination number?
Ans: The main relationship is 2(r_c + r_a) = a
All rights reserved © 2025/ 2026 |
