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Questions and Answers
What is the main characteristic of crystalline solids?
What is the main characteristic of crystalline solids?
- Regular and repeating pattern of constituent particles (correct)
- Absence of crystal lattices
- Irregular pattern of constituent particles
- Random distribution of particles in space
How many possible 3D lattices are there called Bravis Lattices?
How many possible 3D lattices are there called Bravis Lattices?
- 14 (correct)
- 7
- 28
- 21
What is each point in the crystal lattice called?
What is each point in the crystal lattice called?
- Lattice point/lattice site (correct)
- Nucleus
- Vertex
- Node
Which type of unit cell contains constituent particles only at the corner positions?
Which type of unit cell contains constituent particles only at the corner positions?
What is the smallest portion of a crystal lattice that generates the entire lattice when repeated in different directions?
What is the smallest portion of a crystal lattice that generates the entire lattice when repeated in different directions?
In a face-centered unit cell, where are the constituent particles located?
In a face-centered unit cell, where are the constituent particles located?
What angles characterize a unit cell?
What angles characterize a unit cell?
What type of unit cell has one constituent particle at the center of each face?
What type of unit cell has one constituent particle at the center of each face?
How are lattice points connected?
How are lattice points connected?
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Study Notes
Crystalline Solids
- The main characteristic of crystalline solids is their three-dimensional arrangement of particles in a regular and periodic pattern.
Bravais Lattices
- There are 14 possible 3D lattices, known as Bravais Lattices.
Crystal Lattice
- Each point in the crystal lattice is called a lattice point.
Unit Cells
- A primitive unit cell contains constituent particles only at the corner positions.
- The smallest portion of a crystal lattice that generates the entire lattice when repeated in different directions is called a unit cell.
Face-Centered Unit Cell
- In a face-centered unit cell, the constituent particles are located at the center of each face in addition to the corners.
Unit Cell Angles
- A unit cell is characterized by three axes (a, b, and c) and three angles (α, β, and γ) between them.
Unit Cell Types
- A face-centered unit cell has one constituent particle at the center of each face.
Lattice Points
- Lattice points are connected in a three-dimensional pattern to form a crystal lattice.
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